Some work on the patch for builtin slirp support
- some fixes for compiling with Cygwin
- enabled compilation of new slirp module in MinGW/MSYS and Cygwin
- TODO: slirp slows down Bochs emulation on Windows (Linux version is okay)


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12174 6c8e4198-a580-4521-a02f-c9ae86df1db9