Add --disable-zlib configure option
Remove autogen.sh, the autoreconf program does exactly that. Update everything for the latest autoconf and automake versions.
Use CPPFLAGS, LDFLAGS and LIBS as appropiate.
Update configure scripts.
Make configure --help output look nicer.
Added support for packet compression, thanks to Mark Glines. Add "Compression = <level>" to the host config files, where level can be 0 (off), or any integer between 1 (fast) and 9 (best).