Cotonti/Cotonti — pull request #1058 by macik (2012-10-23 18:07:02+00:00)
Title: Adds new type 'custom' for extensions config

Adds new type 'custom' for extensions config.
Calls user defined function for generate input field
in config page and apply custom filter before save to DB.

Some part of Cotonti/Cotonti#1056
and described in http://www.cotonti.com/forums?m=posts&q=7151 (in russian)