[core] recognize "enabled"/"disabled" for bool

(in addition to "enable" and "disable")

src/configfile-glue.c

@@ -45,10 +45,12 @@ int config_plugin_value_tobool (const data_unset *du, int default_value)
     if (du->type == TYPE_STRING) {
         const buffer *b = &((const data_string *)du)->value;
         if (buffer_eq_icase_slen(b, CONST_STR_LEN("enable"))
+            || buffer_eq_icase_slen(b, CONST_STR_LEN("enabled"))
             || buffer_eq_icase_slen(b, CONST_STR_LEN("true"))
             || buffer_eq_icase_slen(b, CONST_STR_LEN("1")))
             return 1;
         else if (buffer_eq_icase_slen(b, CONST_STR_LEN("disable"))
+                 || buffer_eq_icase_slen(b, CONST_STR_LEN("disabled"))
                  || buffer_eq_icase_slen(b, CONST_STR_LEN("false"))
                  || buffer_eq_icase_slen(b, CONST_STR_LEN("0")))
             return 0;