provide admin option for allowing rss/atom feed connections. Need to do this now before the feature is complete so that public sites don't get borked. We also will need a service class for this.
Merge https://github.com/friendica/red into pending_merge
move Friendica photo migrator to addons, bring back a few XML scraping functions that we're going to require (unfortunately)
Merge remote branch 'upstream/master'