cleaned up many text buffer sizes throughout the engine, most now use MAX_INPUTLINE...

cleaned up many text buffer sizes throughout the engine, most now use MAX_INPUTLINE, some use MAX_QPATH, also cleaned up a lot of stuff that had buffer sizes in the code (now uses sizeof)
increased MAX_INPUTLINE from 256 to 16384, so now console commandlines and many other things can be very large

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@5816 d7cf8633-e32d-0410-b094-e92efae38249