Limit number of entries per Atom feed
Limit number of entries per Atom feed

We're currently putting everything ever written in there which doesn't
seem good.


Former-commit-id: 050d2214dbc2d5d3eb8451de1b6ea92aa0e0f629
brandur/sorg,brandur/sorg,brandur/sorg,brandur/sorg,brandur/sorg