ubik: Rename flags to dbFlags

ubik: Rename flags to dbFlags

Rename ubik_dbase->flags to ubik_dbase->dbFlags, to make it easier to
distinguish between other fields and variables just called 'flags'.

Change-Id: I17258f9a65e989943d066307e332550d66ca7500
Reviewed-on: https://gerrit.openafs.org/13864
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Marcio Brito Barbosa <mbarbosa@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Tested-by: BuildBot <buildbot@rampaginggeek.com>