rra-c-util 4.5

This is a relatively minor update, but since I'm releasing another client package, I may as well put out a new release. There are two Kerberos portability changes: defining KRB5_WELLKNOWN_NAME and KRB5_ANON_NAME to use to construct the anonymous Kerberos identity, and adding a replacement for krb5_free_string for use with krb5_cc_get_full_name. The PAM utility library now better handles a NULL pam_args struct. And the PAM testing library does less automatic setup to make it easier to test more PAM invocation scenarios.

You can get the latest release from the rra-c-util distribution page.