gen-soccon.c: New utility program to generate g-soccon.ads automatically.

gen-soccon.c: New utility program to generate g-soccon.ads automatically.

	* gen-soccon.c: New utility program to generate g-soccon.ads
	automatically.

	* socket.c, gsocket.h: Split inclusion of system header files into a
	gsocket.h file separated from socket.c, to allow reuse in gen-soccon.c.

	* g-soccon.ads, g-soccon-unixware.ads, g-soccon-tru64.ads,
	g-soccon-aix.ads, g-soccon-irix.ads, g-soccon-hpux.ads,
	g-soccon-interix.ads, g-soccon-solaris.ads, g-soccon-mingw.ads,
	g-soccon-vxworks.ads, g-soccon-freebsd.ads: Note that these files
	should not be edited by hand anymore, but should be regenerated using
	gen-soccon.

From-SVN: r92828