request for review: gssd patch for alternate cred cache files

[Rick Macklem]

Hi,

A couple of people have reported problems using NFS
mounts with sec=krb5 because the version of sshd they
use doesn't use credential cache files named /tmp/krb5cc_<N>.

The attached patch modifies the gssd so that it
roughly emulates what the gssd used
by most Linux distros does when a new "-s" option is used.
This has been tested by the reporters and fixed their issue.

Would someone like to review this?

rick
ps: The patch can also be found at
     http://people.freebsd.org/~rmacklem/gssd-ccache.patch
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