This option is available in the Linux implementation of pam_krb5
and allows to authorize a user not known to the local system.
Ccache is not used as we don't have a secure uid/gid for the cache file.
Usable for authentication of external kerberos users (e.g Active Directory)
via PAM from applications like Cyrus saslauthd, PHP or perl.
PR: bin/146186
Submitted by: myself
Approved by: deplhij (mentor)
MFC after: 2 weeks
551e75c7af