collector: add a simple command to add Atom/RSS feeds
collector: insert proper link for rss feed

Also, do not add etag since it is used later on to add news items.
collector: use configured redis for job scheduling
collector: cosmetics for rss_collector
collector: use configured redis for rss check job
collector: add logging support to rss check job
collector: cosmetic fixes to rss check job
collector: use rss link tag since it may differ from rss location

Happens when the rss is hosted on an aggregator.
collector: make IPv6 work in irssi script
collector: add a little hello world at the end of irssi script
collector: use configured redis in index_url command
collector: use username instead of id in index_url command

More user friendlyness please.