ZP-244 #comment added 'lastsync' as possible z-push-admin action. This is not the best way to implement it and will be changed with ZP-238 #time 45m

git-svn-id: https://z-push.org/svn/z-push/trunk@1473 b7dd7b3b-3a3c-0410-9da9-bee62a6cc5b5