Tweaked client handling of "Server is version x.xx" server rejection messages.
Client now sends info requests to servers with both KMQ2 and stock Q2 protocol versions.
Client now ignores server "wrong version" status messages.
Added server sending protocol version in challenge message.
Overhauled slider menu control to show cvar value and simplify implementation.
Changed RGB color increment for railtrail in effects options menu from 16 to 4.
Changed default values for cl_railgreen and cl_railblue to be multiples of 4 to match increment of menu sliders.
Moved misc utility functions in ui_subsystem.c to ui_utils.c.
Added cl_http_fallback cvar to disable Q2Pro path and UDP fallback for HTTP downloads.
Added check to prevent game library from sending unicasts to non-present clients (i.e. bots).
Updated Lazarus version number.
Updated Qudos' Unix makefile for source file changes. Compiling for Linux still needs more fixes, such as static libs (libcurl/zlib/png/jpeg/ogg/vorbisfile).
Added UDP fallback from HTTP downloads and support for Q2Pro-style HTTP URLs.
Now allows downloading non-numerical pak files via flagging certain paks as protected.
Misc filesystem changes.
