Correct response code for normal behaviour per RFC2518.  Write handling for collections, since we now actually have such beasts.
Correct response code for normal behaviour per RFC2518.  Write handling for
collections, since we now actually have such beasts.

lkraav/davical-rss-feature-branch,lkraav/davical-rss-feature-branch,lkraav/davical-rss-feature-branch,lkraav/davical-rss-feature-branch