1.1.3dev: Upgrade DB schema adding a new table `notify_watch`. (refs #11869)
The table can later be used by notification subscribers to store user preferences,
e.g. for watching selected targets (e.g. individual tickets, wikipages, users, groups, components etc.)

git-svn-id: http://trac.edgewall.org/intertrac/log:/trunk@13551 af82e41b-90c4-0310-8c96-b1721e28e2e2