* cleanup.c: Call update_utmp() with the correct pid to assist in

	* cleanup.c: Call update_utmp() with the correct pid to assist in
	finding the old utmp entry.

	* open_ctty.c: Reformat somewhat and revise comment.

	* open_slave.c: Rework significantly.  Primarily, keep a fd open
	to the slave if we need to reopen the slave device following
	vhangup() or revoke(), to accommodate various OS quirks.

	* update_utmp.c: Revise history section somewhat to document more
	HP-UX brokenness.  Search via ut_pid before searching via
	ut_line.  Copy stuff around because entuxent() will clobber some
	things.

	* void_assoc.c: Revise comment and reformat somewhat.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@13234 dc483132-0cff-0310-8789-dd5450dbe970