The check whether POSIX socket.h or WIN32 winsock2.h must be included can be
made centrally. The downside is that some functionality of e.g. arpa/inet.h is
also implemented in winsock.h, so that some files that don't use socket
functions, but do use inet.h functions, must also include pulsecore/socket.h.
(as well as arpa/inet.h)
At least for pipes, recv() with MSG_PEEK does actually eat up data from
file descriptors. Hence, this can't be used for PULLHUP emulation.
Use another ioctl hack for that.
Even on 10.5.8, poll() does not do the right thing. Haven't checked on
newer versions. Hence, wrap all occurences of poll() to pa_poll and
emulate that call with select() on OSX. This is totally embarassing.
