Change default permissions of /etc/openafs/server to 0755

Change default permissions of /etc/openafs/server to 0755

* Change the default permissions of /etc/openafs/server to 0755 to match
  upstream defaults, but do not change permissions on upgrade.  The only
  file in that directory that needs to be protected is KeyFile, which
  should be mode 0600 anyway.  Drop the patch to bosserver to allow more
  restrictive permissions.  bosserver will complain about directory
  permissions after upgrade until the directory is manually changed.