Added SetUserInfo command to sdktools.

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%402247

plugins/include/sdktools_functions.inc

@@ -308,3 +308,15 @@ native EquipPlayerWeapon(client, weapon);
  * @error				Invalid entity or lack of mod support.
  */
 native ActivateEntity(entity);
+
+/**
+ * Sets values to client info buffer keys and notifies the engine of the change.
+ * The change does not get propogated to mods until the next frame.
+ *
+ * @param client		Player's index.
+ * @param key			Key string.
+ * @param value			Value string.
+ * @noreturn
+ * @error				Invalid client index, or client not connected.
+ */
+native SetClientInfo(client, const String:key[], const String:value[]);