[Libvir] 18/22 Misc headers

Miscellaneous changes to headers. The important one is that if <winsock2.h> is available then that replaces all of the usual socket- and network database-related headers (which are not available in Windows). Thus you end up with code like this: #ifndef HAVE_WINSOCK2_H #include <sys/socket.h> #include <netdb.h> #include <netinet/in.h> #else #include <winsock2.h> #endif Rich. -- Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/ Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 03798903