configure.in (LOGINLIBS): Remove DECLARE_SYS_ERRLIST since it's no

configure.in (LOGINLIBS): Remove DECLARE_SYS_ERRLIST since it's no
	longer necessary.

krcp.c (verifydir, allocbuf, rsource, source, sink): Don't use
	sys_errlist[]; just call error_message() instead, since we depend on
	com_err anyway.

krshd.c (recvauth):
krlogind.c (recvauth): Don't actually check the checksum unless it is
	required.  Old (pre-beta 5) clients sent a checksum of random garbage
	(such as their pid) which is impossible to actually check on the
	server side.  (Grad student stupidity strikes again.)

	(fatalperror): Don't use sys_errlist[] to get the right error
	message; just depend on com_err instead, since we're using it anyway.

krshd.c (doit):
krlogind.c (do_krb_login): Fix logic so that if checksums are
	required, and the checksum is valid, don't syslog the stupid warning
	message about "Checksums are only required for v5 clients...."

krcp.c, krshd.c, krlogind.c: Miscellaneous -Wall cleanups

krlogind.c (getpty): Removed dead code.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@7823 dc483132-0cff-0310-8789-dd5450dbe970