gmod_src: Replaced mode code with URL Builder

Revision 569
Replaced mode code with URL BuilderChanged Files:
[ul]
[li]trunk/src_garrysmod/garrysmod/URLBuilder.cpp[/li][li]trunk/src_garrysmod/garrysmod/URLBuilder.h[/li][li]trunk/src_garrysmod/garrysmod/garrysmod.cpp[/li][/ul]
Committed By Garry Newman