restablished inclusion of fcntl.h and netinet/tcp.h in xcb_util.c -- without these the code no longer compiled on *ix
restablished inclusion of fcntl.h and netinet/tcp.h in xcb_util.c -- without these the code no longer compiled on *ix

topcat/xcb-win32,stapelberg/libxcb,stapelberg/libxcb,stapelberg/libxcb,topcat/xcb-win32,topcat/xcb-win32,topcat/xcb-win32,topcat/xcb-win32