correct SET GLOBAL ft_boolean_syntax=DEFAULT behaviour

sql/mysql_priv.h

@@ -791,7 +791,7 @@ bool load_db_opt(THD *thd, const char *path, HA_CREATE_INFO *create);
 extern time_t start_time;
 extern char *mysql_data_home,server_version[SERVER_VERSION_LENGTH],
 	    mysql_real_data_home[], *opt_mysql_tmpdir, mysql_charsets_dir[],
-            opt_ft_boolean_syntax[sizeof(ft_boolean_syntax)];
+            def_ft_boolean_syntax[sizeof(ft_boolean_syntax)];
 #define mysql_tmpdir (my_tmpdir(&mysql_tmpdir_list))
 extern MY_TMPDIR mysql_tmpdir_list;
 extern const char *command_name[];

sql/mysqld.cc

@@ -326,7 +326,7 @@ char mysql_real_data_home[FN_REFLEN],
      language[LIBLEN],reg_ext[FN_EXTLEN], mysql_charsets_dir[FN_REFLEN],
      max_sort_char,*mysqld_user,*mysqld_chroot, *opt_init_file,
      *opt_init_connect, *opt_init_slave,
-     opt_ft_boolean_syntax[sizeof(ft_boolean_syntax)];
+     def_ft_boolean_syntax[sizeof(ft_boolean_syntax)];
 
 const char *opt_date_time_formats[3];
 
@@ -5651,7 +5651,7 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
       fprintf(stderr, "Invalid ft-boolean-syntax string: %s\n", argument);
       exit(1);
     }
-    strmake(opt_ft_boolean_syntax, argument, sizeof(ft_boolean_syntax)-1);
+    strmake(ft_boolean_syntax, argument, sizeof(ft_boolean_syntax)-1);
     break;
   case OPT_SKIP_SAFEMALLOC:
 #ifdef SAFEMALLOC
@@ -5701,7 +5701,7 @@ static void get_options(int argc,char **argv)
   int ho_error;
 
   my_getopt_register_get_addr(mysql_getopt_value);
-  strmake(opt_ft_boolean_syntax, ft_boolean_syntax, 
+  strmake(def_ft_boolean_syntax, ft_boolean_syntax,
 	  sizeof(ft_boolean_syntax)-1);
   if ((ho_error=handle_options(&argc, &argv, my_long_options, get_one_option)))
     exit(ho_error);
@@ -5758,8 +5758,6 @@ static void get_options(int argc,char **argv)
   table_alias_charset= (lower_case_table_names ?
 			files_charset_info :
 			&my_charset_bin);
-  strmake(ft_boolean_syntax, opt_ft_boolean_syntax,
-	  sizeof(ft_boolean_syntax)-1);
 
   if (opt_short_log_format)
     opt_specialflag|= SPECIAL_SHORT_LOG_FORMAT;

sql/set_var.cc

@@ -901,7 +901,7 @@ static bool sys_update_ftb_syntax(THD *thd, set_var * var)
 
 static void sys_default_ftb_syntax(THD *thd, enum_var_type type)
 {
-  strmake(ft_boolean_syntax, opt_ft_boolean_syntax,
+  strmake(ft_boolean_syntax, def_ft_boolean_syntax,
 	  sizeof(ft_boolean_syntax)-1);
 }