cleanup_exit() function. re-refine cleanup_exit() where appropriate,
allocate sshd's authctxt eary to allow simpler cleanup in sshd.
tested by many, ok deraadt@
+ - markus@cvs.openbsd.org 2003/09/23 20:18:52
+ [progressmeter.c]
+ don't print trailing \0; bug #709; Robert.Dahlem@siemens.com
+ ok millert/deraadt@
20030930
- (bal) Fix issues in openbsd-compat/realpath.c