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	(create_process): #if 0 out the code which sets the child's
	handler for SIGCHLD to sigchld; the code which gives sigchld its
	value has been diked out under these CPP symbols, so this should
	be diked out too.

(create_process) [HAVE_SETSID]: Use TIOCSCTTY if exists.

	system doesn't have that facility.

	* process.c: [USG5] Don't include <fcntl.h>.
	[USG] Don't bother including termios, termio, or fcntl; systerm.h
	takes care of all that.
	Remove the "mis;tak-+;;" line from the code; apparently this
	section of code does get used.

	* process.c (wait_reading_process_input): Put comments around
	text following #endif.