ptserver: improve PR_GetHostCPS logging

ptserver: improve PR_GetHostCPS logging

The IP address of the host is logged as a signed number.  Instead, log
it as the unsigned (and hex) representation of the host IP addr.

Reviewed-on: https://gerrit.openafs.org/13043
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
(cherry picked from commit 8225518cd08b810bf3d8c74e27e3d3a753b6b30b)

Change-Id: Idbb380fa0c9d71398ea2d47ba49fd217be9f9f26
Reviewed-on: https://gerrit.openafs.org/13147
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>