samba security, bug fix, and enhancement update

4.15.5-5 - resolves: rhbz2064325 - Fix 'create krb5 conf = yes' when a KDC has a single IP address. 4.15.5-4 - resolves: rhbz2057503 - Fix winbind kerberos ticket refresh 4.15.5-3 - related: rhbz1979959 - Fix typo in testparm output 4.15.5-2 - resolves: rhbz1979959 - Improve idmap autorid sanity...