Added --enable-debug flag to configure.ac. It currently only enables the DebugContext macro in main.c
GNet, which was originally chosen to be used as the networking library is obsolete and upstream is no longer developed. Thus, I moved to GLib/GIO (which sucks, without proper examples).
Signed-off-by: Gergely Polonkai (W00d5t0ck) <polesz@w00d5t0ck.info>