pass wildcard_character to .cmp()

docs/keys.rst

@@ -145,7 +145,7 @@ property, that behaves like the ``compareFunction`` described in
     ...
     return {
       ...
-      'cmp': function (b) {
+      'cmp': function (b, wildcard_character) {
         if (a < b) {
           return -1;
         }
@@ -161,6 +161,7 @@ property, that behaves like the ``compareFunction`` described in
     cast_to: myType
   ...
 
+``wildcard_character`` is only passed by ``=`` and ``!=`` operators.
 
 If the < or > comparison makes no sense for the objects, the function should return ``undefined``.
 

src/queries/core/simplequery.js

@@ -205,7 +205,7 @@ SimpleQuery.prototype["="] = function (object_value, comparison_value,
       return false;
     }
     if (value.cmp !== undefined) {
-      return value.cmp(comparison_value) === 0;
+      return value.cmp(comparison_value, wildcard_character) === 0;
     }
     if (
       convertStringToRegExp(
@@ -249,7 +249,7 @@ SimpleQuery.prototype["!="] = function (object_value, comparison_value,
       return true;
     }
     if (value.cmp !== undefined) {
-      return value.cmp(comparison_value) !== 0;
+      return value.cmp(comparison_value, wildcard_character) !== 0;
     }
     if (
       convertStringToRegExp(