Tristan Gingold: First versions, all files except those listed below.

Ben Pfaff: Files below, and lots of patches.
	stubs/stubs-readline.c
	stubs/stubs-history.c
	stubs/stubs-gd.c
	stubs/stubs-libpq-fe.c
	stubs/stubs-fenv.c
	stubs/stubs-gmp.c
	stubs/stubs-syslog.c
	doc/checker.1
	doc/checkergcc.1
