Added support for trailing commas within libconfig arrays

- A trailing comma in conf/plugins.conf will no longer cause a parse
  error. This makes it easier to comment out plugins to disable them.
- conf/plugins.conf has been updated to reflect this change.

Signed-off-by: Haru <haru@dotalux.com>

2 files changed, 106 insertions, 89 deletions

diff --git a/3rdparty/libconfig/extra/gen/grammar.y b/3rdparty/libconfig/extra/gen/grammar.y
index f578897cb..576241c01 100644
--- a/3rdparty/libconfig/extra/gen/grammar.y
+++ b/3rdparty/libconfig/extra/gen/grammar.y
@@ -118,6 +118,11 @@ setting_terminator:
   | TOK_COMMA
   ;
 
+comma_optional:
+    /* empty */
+  | TOK_COMMA
+  ;
+
 setting:
   TOK_NAME
   {
@@ -359,9 +364,13 @@ value_list_optional:
   | value_list
   ;
 
-simple_value_list:
+simple_value_list_sub:
     simple_value
-  | simple_value_list TOK_COMMA simple_value
+  | simple_value_list_sub TOK_COMMA simple_value
+  ;
+
+simple_value_list:
+    simple_value_list_sub comma_optional
   ;
 
 simple_value_list_optional:
diff --git a/3rdparty/libconfig/grammar.c b/3rdparty/libconfig/grammar.c
index 0331c1854..47fb7b5dd 100644
--- a/3rdparty/libconfig/grammar.c
+++ b/3rdparty/libconfig/grammar.c
@@ -445,16 +445,16 @@ union yyalloc
 /* YYFINAL -- State number of the termination state.  */
 #define YYFINAL  6
 /* YYLAST -- Last index in YYTABLE.  */
-#define YYLAST   35
+#define YYLAST   36
 
 /* YYNTOKENS -- Number of terminals.  */
 #define YYNTOKENS  23
 /* YYNNTS -- Number of nonterminals.  */
-#define YYNNTS  20
+#define YYNNTS  22
 /* YYNRULES -- Number of rules.  */
-#define YYNRULES  39
+#define YYNRULES  42
 /* YYNRULES -- Number of states.  */
-#define YYNSTATES  47
+#define YYNSTATES  49
 
 /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
 #define YYUNDEFTOK  2
@@ -502,32 +502,35 @@ static const yytype_uint8 yytranslate[] =
 static const yytype_uint8 yyprhs[] =
 {
        0,     0,     3,     4,     6,     8,    11,    12,    14,    15,
-      17,    19,    20,    26,    27,    32,    33,    38,    40,    42,
-      44,    46,    48,    51,    53,    55,    57,    59,    61,    63,
-      65,    67,    71,    72,    74,    76,    80,    81,    83,    84
+      17,    19,    20,    22,    23,    29,    30,    35,    36,    41,
+      43,    45,    47,    49,    51,    54,    56,    58,    60,    62,
+      64,    66,    68,    70,    74,    75,    77,    79,    83,    86,
+      87,    89,    90
 };
 
 /* YYRHS -- A `-1'-separated list of the rules' RHS.  */
 static const yytype_int8 yyrhs[] =
 {
-      24,     0,    -1,    -1,    25,    -1,    28,    -1,    25,    28,
+      24,     0,    -1,    -1,    25,    -1,    29,    -1,    25,    29,
       -1,    -1,    25,    -1,    -1,    20,    -1,    17,    -1,    -1,
-      10,    29,    11,    34,    27,    -1,    -1,    13,    31,    40,
-      14,    -1,    -1,    15,    33,    38,    16,    -1,    36,    -1,
-      30,    -1,    32,    -1,    41,    -1,     9,    -1,    35,     9,
-      -1,     3,    -1,     4,    -1,     6,    -1,     5,    -1,     7,
-      -1,     8,    -1,    35,    -1,    34,    -1,    37,    17,    34,
-      -1,    -1,    37,    -1,    36,    -1,    39,    17,    36,    -1,
-      -1,    39,    -1,    -1,    18,    42,    26,    19,    -1
+      17,    -1,    -1,    10,    30,    11,    35,    27,    -1,    -1,
+      13,    32,    42,    14,    -1,    -1,    15,    34,    39,    16,
+      -1,    37,    -1,    31,    -1,    33,    -1,    43,    -1,     9,
+      -1,    36,     9,    -1,     3,    -1,     4,    -1,     6,    -1,
+       5,    -1,     7,    -1,     8,    -1,    36,    -1,    35,    -1,
+      38,    17,    35,    -1,    -1,    38,    -1,    37,    -1,    40,
+      17,    37,    -1,    40,    28,    -1,    -1,    41,    -1,    -1,
+      18,    44,    26,    19,    -1
 };
 
 /* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
 static const yytype_uint16 yyrline[] =
 {
        0,   100,   100,   102,   106,   107,   110,   112,   115,   117,
-     118,   123,   122,   142,   141,   165,   164,   187,   188,   189,
-     190,   194,   195,   199,   219,   241,   263,   285,   307,   325,
-     353,   354,   357,   359,   363,   364,   367,   369,   374,   373
+     118,   121,   123,   128,   127,   147,   146,   170,   169,   192,
+     193,   194,   195,   199,   200,   204,   224,   246,   268,   290,
+     312,   330,   358,   359,   362,   364,   368,   369,   373,   376,
+     378,   383,   382
 };
 #endif
 
@@ -542,9 +545,10 @@ static const char *const yytname[] =
   "TOK_LIST_START", "TOK_LIST_END", "TOK_COMMA", "TOK_GROUP_START",
   "TOK_GROUP_END", "TOK_SEMICOLON", "TOK_GARBAGE", "TOK_ERROR", "$accept",
   "configuration", "setting_list", "setting_list_optional",
-  "setting_terminator", "setting", "$@1", "array", "$@2", "list", "$@3",
-  "value", "string", "simple_value", "value_list", "value_list_optional",
-  "simple_value_list", "simple_value_list_optional", "group", "$@4", 0
+  "setting_terminator", "comma_optional", "setting", "$@1", "array", "$@2",
+  "list", "$@3", "value", "string", "simple_value", "value_list",
+  "value_list_optional", "simple_value_list_sub", "simple_value_list",
+  "simple_value_list_optional", "group", "$@4", 0
 };
 #endif
 
@@ -563,18 +567,20 @@ static const yytype_uint16 yytoknum[] =
 static const yytype_uint8 yyr1[] =
 {
        0,    23,    24,    24,    25,    25,    26,    26,    27,    27,
-      27,    29,    28,    31,    30,    33,    32,    34,    34,    34,
-      34,    35,    35,    36,    36,    36,    36,    36,    36,    36,
-      37,    37,    38,    38,    39,    39,    40,    40,    42,    41
+      27,    28,    28,    30,    29,    32,    31,    34,    33,    35,
+      35,    35,    35,    36,    36,    37,    37,    37,    37,    37,
+      37,    37,    38,    38,    39,    39,    40,    40,    41,    42,
+      42,    44,    43
 };
 
 /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
 static const yytype_uint8 yyr2[] =
 {
        0,     2,     0,     1,     1,     2,     0,     1,     0,     1,
-       1,     0,     5,     0,     4,     0,     4,     1,     1,     1,
-       1,     1,     2,     1,     1,     1,     1,     1,     1,     1,
-       1,     3,     0,     1,     1,     3,     0,     1,     0,     4
+       1,     0,     1,     0,     5,     0,     4,     0,     4,     1,
+       1,     1,     1,     1,     2,     1,     1,     1,     1,     1,
+       1,     1,     1,     3,     0,     1,     1,     3,     2,     0,
+       1,     0,     4
 };
 
 /* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state
@@ -582,18 +588,19 @@ static const yytype_uint8 yyr2[] =
    means the default is an error.  */
 static const yytype_uint8 yydefact[] =
 {
-       2,    11,     0,     3,     4,     0,     1,     5,     0,    23,
-      24,    26,    25,    27,    28,    21,    13,    15,    38,    18,
-      19,     8,    29,    17,    20,    36,    32,     6,    10,     9,
-      12,    22,    34,    37,     0,    30,    33,     0,     7,     0,
-       0,    14,     0,    16,    39,    35,    31
+       2,    13,     0,     3,     4,     0,     1,     5,     0,    25,
+      26,    28,    27,    29,    30,    23,    15,    17,    41,    20,
+      21,     8,    31,    19,    22,    39,    34,     6,    10,     9,
+      14,    24,    36,    11,    40,     0,    32,    35,     0,     7,
+       0,    12,    38,    16,     0,    18,    42,    37,    33
 };
 
 /* YYDEFGOTO[NTERM-NUM].  */
 static const yytype_int8 yydefgoto[] =
 {
-      -1,     2,     3,    39,    30,     4,     5,    19,    25,    20,
-      26,    21,    22,    23,    36,    37,    33,    34,    24,    27
+      -1,     2,     3,    40,    30,    42,     4,     5,    19,    25,
+      20,    26,    21,    22,    23,    37,    38,    33,    34,    35,
+      24,    27
 };
 
 /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
@@ -601,18 +608,19 @@ static const yytype_int8 yydefgoto[] =
 #define YYPACT_NINF -26
 static const yytype_int8 yypact[] =
 {
-      -8,   -26,    12,    -8,   -26,     5,   -26,   -26,     0,   -26,
+      -7,   -26,     4,    -7,   -26,     1,   -26,   -26,     2,   -26,
      -26,   -26,   -26,   -26,   -26,   -26,   -26,   -26,   -26,   -26,
-     -26,    -6,    10,   -26,   -26,    23,     0,    -8,   -26,   -26,
-     -26,   -26,   -26,     3,     7,   -26,     6,     8,    -8,    14,
-      23,   -26,     0,   -26,   -26,   -26,   -26
+     -26,    -4,     5,   -26,   -26,    18,     2,    -7,   -26,   -26,
+     -26,   -26,   -26,    11,   -26,    15,   -26,    13,    16,    -7,
+      12,    18,   -26,   -26,     2,   -26,   -26,   -26,   -26
 };
 
 /* YYPGOTO[NTERM-NUM].  */
 static const yytype_int8 yypgoto[] =
 {
-     -26,   -26,    -5,   -26,   -26,    -3,   -26,   -26,   -26,   -26,
-     -26,   -25,   -26,   -15,   -26,   -26,   -26,   -26,   -26,   -26
+     -26,   -26,     6,   -26,   -26,   -26,    -3,   -26,   -26,   -26,
+     -26,   -26,   -25,   -26,   -23,   -26,   -26,   -26,   -26,   -26,
+     -26,   -26
 };
 
 /* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
@@ -622,29 +630,29 @@ static const yytype_int8 yypgoto[] =
 #define YYTABLE_NINF -1
 static const yytype_uint8 yytable[] =
 {
-       7,    35,     1,     9,    10,    11,    12,    13,    14,    15,
-      32,    28,     6,    16,    29,    17,     8,    46,    18,    31,
-      40,    41,    38,    42,    43,    45,     9,    10,    11,    12,
-      13,    14,    15,    44,     0,     7
+       7,    36,    32,     1,     6,     9,    10,    11,    12,    13,
+      14,    15,     8,    28,    31,    16,    29,    17,    47,    48,
+      18,     9,    10,    11,    12,    13,    14,    15,    41,    43,
+      44,    46,    45,    39,     0,     0,     7
 };
 
 static const yytype_int8 yycheck[] =
 {
-       3,    26,    10,     3,     4,     5,     6,     7,     8,     9,
-      25,    17,     0,    13,    20,    15,    11,    42,    18,     9,
-      17,    14,    27,    17,    16,    40,     3,     4,     5,     6,
-       7,     8,     9,    19,    -1,    38
+       3,    26,    25,    10,     0,     3,     4,     5,     6,     7,
+       8,     9,    11,    17,     9,    13,    20,    15,    41,    44,
+      18,     3,     4,     5,     6,     7,     8,     9,    17,    14,
+      17,    19,    16,    27,    -1,    -1,    39
 };
 
 /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
    symbol of state STATE-NUM.  */
 static const yytype_uint8 yystos[] =
 {
-       0,    10,    24,    25,    28,    29,     0,    28,    11,     3,
-       4,     5,     6,     7,     8,     9,    13,    15,    18,    30,
-      32,    34,    35,    36,    41,    31,    33,    42,    17,    20,
-      27,     9,    36,    39,    40,    34,    37,    38,    25,    26,
-      17,    14,    17,    16,    19,    36,    34
+       0,    10,    24,    25,    29,    30,     0,    29,    11,     3,
+       4,     5,     6,     7,     8,     9,    13,    15,    18,    31,
+      33,    35,    36,    37,    43,    32,    34,    44,    17,    20,
+      27,     9,    37,    40,    41,    42,    35,    38,    39,    25,
+      26,    17,    28,    14,    17,    16,    19,    37,    35
 };
 
 #define yyerrok		(yyerrstatus = 0)
@@ -1483,10 +1491,10 @@ yyreduce:
   YY_REDUCE_PRINT (yyn);
   switch (yyn)
     {
-        case 11:
+        case 13:
 
 /* Line 1464 of yacc.c  */
-#line 123 "grammar.y"
+#line 128 "grammar.y"
     {
     ctx->setting = config_setting_add(ctx->parent, (yyvsp[(1) - (1)].sval), CONFIG_TYPE_NONE);
 
@@ -1502,10 +1510,10 @@ yyreduce:
   }
     break;
 
-  case 13:
+  case 15:
 
 /* Line 1464 of yacc.c  */
-#line 142 "grammar.y"
+#line 147 "grammar.y"
     {
     if(IN_LIST())
     {
@@ -1521,20 +1529,20 @@ yyreduce:
   }
     break;
 
-  case 14:
+  case 16:
 
 /* Line 1464 of yacc.c  */
-#line 157 "grammar.y"
+#line 162 "grammar.y"
     {
     if(ctx->parent)
       ctx->parent = ctx->parent->parent;
   }
     break;
 
-  case 15:
+  case 17:
 
 /* Line 1464 of yacc.c  */
-#line 165 "grammar.y"
+#line 170 "grammar.y"
     {
     if(IN_LIST())
     {
@@ -1550,34 +1558,34 @@ yyreduce:
   }
     break;
 
-  case 16:
+  case 18:
 
 /* Line 1464 of yacc.c  */
-#line 180 "grammar.y"
+#line 185 "grammar.y"
     {
     if(ctx->parent)
       ctx->parent = ctx->parent->parent;
   }
     break;
 
-  case 21:
+  case 23:
 
 /* Line 1464 of yacc.c  */
-#line 194 "grammar.y"
+#line 199 "grammar.y"
     { parsectx_append_string(ctx, (yyvsp[(1) - (1)].sval)); free((yyvsp[(1) - (1)].sval)); }
     break;
 
-  case 22:
+  case 24:
 
 /* Line 1464 of yacc.c  */
-#line 195 "grammar.y"
+#line 200 "grammar.y"
     { parsectx_append_string(ctx, (yyvsp[(2) - (2)].sval)); free((yyvsp[(2) - (2)].sval)); }
     break;
 
-  case 23:
+  case 25:
 
 /* Line 1464 of yacc.c  */
-#line 200 "grammar.y"
+#line 205 "grammar.y"
     {
     if(IN_ARRAY() || IN_LIST())
     {
@@ -1599,10 +1607,10 @@ yyreduce:
   }
     break;
 
-  case 24:
+  case 26:
 
 /* Line 1464 of yacc.c  */
-#line 220 "grammar.y"
+#line 225 "grammar.y"
     {
     if(IN_ARRAY() || IN_LIST())
     {
@@ -1626,10 +1634,10 @@ yyreduce:
   }
     break;
 
-  case 25:
+  case 27:
 
 /* Line 1464 of yacc.c  */
-#line 242 "grammar.y"
+#line 247 "grammar.y"
     {
     if(IN_ARRAY() || IN_LIST())
     {
@@ -1653,10 +1661,10 @@ yyreduce:
   }
     break;
 
-  case 26:
+  case 28:
 
 /* Line 1464 of yacc.c  */
-#line 264 "grammar.y"
+#line 269 "grammar.y"
     {
     if(IN_ARRAY() || IN_LIST())
     {
@@ -1680,10 +1688,10 @@ yyreduce:
   }
     break;
 
-  case 27:
+  case 29:
 
 /* Line 1464 of yacc.c  */
-#line 286 "grammar.y"
+#line 291 "grammar.y"
     {
     if(IN_ARRAY() || IN_LIST())
     {
@@ -1707,10 +1715,10 @@ yyreduce:
   }
     break;
 
-  case 28:
+  case 30:
 
 /* Line 1464 of yacc.c  */
-#line 308 "grammar.y"
+#line 313 "grammar.y"
     {
     if(IN_ARRAY() || IN_LIST())
     {
@@ -1730,10 +1738,10 @@ yyreduce:
   }
     break;
 
-  case 29:
+  case 31:
 
 /* Line 1464 of yacc.c  */
-#line 326 "grammar.y"
+#line 331 "grammar.y"
     {
     if(IN_ARRAY() || IN_LIST())
     {
@@ -1760,10 +1768,10 @@ yyreduce:
   }
     break;
 
-  case 38:
+  case 41:
 
 /* Line 1464 of yacc.c  */
-#line 374 "grammar.y"
+#line 383 "grammar.y"
     {
     if(IN_LIST())
     {
@@ -1779,10 +1787,10 @@ yyreduce:
   }
     break;
 
-  case 39:
+  case 42:
 
 /* Line 1464 of yacc.c  */
-#line 389 "grammar.y"
+#line 398 "grammar.y"
     {
     if(ctx->parent)
       ctx->parent = ctx->parent->parent;
@@ -1792,7 +1800,7 @@ yyreduce:
 
 
 /* Line 1464 of yacc.c  */
-#line 1796 "grammar.c"
+#line 1804 "grammar.c"
       default: break;
     }
   YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
@@ -2004,6 +2012,6 @@ yyreturn:
 
 
 /* Line 1684 of yacc.c  */
-#line 395 "grammar.y"
+#line 404 "grammar.y"