ubik: disambiguate "Synchonize database with server" msgs

ubik: disambiguate "Synchonize database with server" msgs

Ubik issues the same message in two very different cases:
- sync server issues DISK_GetFile to obtain the latest version
- non-sync server receives DISK_SendFile from the sync server

Modify the messages so they provide more information and are
distinguishable from each other.

Reviewed-on: https://gerrit.openafs.org/12615
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
(cherry picked from commit b9fe4d4290ad19faf3b5fb5dc0c3b1ee3ee5ab69)

Change-Id: I806c2ce5ada097b07022d8c4da81f613a3f9989c
Reviewed-on: https://gerrit.openafs.org/13186
Reviewed-by: Mark Vitale <mvitale@sinenomine.net>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Joe Gorse <jhgorse@gmail.com>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Marcio Brito Barbosa <mbarbosa@sinenomine.net>
Reviewed-by: Cheyenne Wills <cwills@sinenomine.net>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>