* configure.in: Fix some quoting of shell variables when passing

	* configure.in: Fix some quoting of shell variables when passing
	to "test".  Reorder some logic in consistency checks to validate
	cache variables against "yes" to account for possible empty or
	nonexistent values.

	* pty-int.h: Fix conditional prototype of update_wtmp().

	* update_wtmp.c: Fix conditional compilation of update_wtmp() to
	cover the case where we have setutxent() but don't have updwtmpx()
	and WTMPX_FILE, as is the case on some Linux installations.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@13222 dc483132-0cff-0310-8789-dd5450dbe970