renderer -> renderergl1, rend2 -> renderergl2
Fixed build for mac (s/rend2/opengl2/)
5097 - Menu corrupted on start (on IRIX)
5717 - Gamecode can open file "" for reading
Remove unneeded variable extern
condump improvements

Default output file extension to ".txt"
Show output filename in error message.
Use Windows line endings on Windows.
Dynamically allocate line buffer. (by ZTM)