* pam_krb5afs.c(get_config,pam_sm_authenticate): free the name of the
    	default realm after we finish with it.
    * pam_krb5afs.c(pam_sm_chauthtok): don't bother constructing the name
    	of a password-changing service: it's redundant.
    * pam_krb5afs.c(get_config): rework address list parsing.
    * pam_krb5afs.c(pam_sm_chauthtok): free result and result code
    	strings, if we get some.  Log the debug message before we free the
    	configuration.