gmod_src: Replaced old code with URLBuilder class

Revision 568
Replaced old code with URLBuilder classChanged 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