Issue #1496510: Convert search settings to configuration system.
Patch #1710512 by n3or: Convert update settings to configuration system.
Issue #1496462 by acrollet, sun, cosmicdreams, Niklas Fiekas, aspilicious: convert RSS publishing settings to configuration system.
Merge pull request #344 from hellomrcat/170-rss

Issue #1496462 by acrollet, sun, cosmicdreams, Niklas Fiekas, aspilicious: convert RSS publishing settings to configuration system.
Merge pull request #345 from hellomrcat/170-search

Issue #1496510: Convert search settings to configuration system.
Merge pull request #348 from hellomrcat/170-update

Patch #1710512 by n3or: Convert update settings to configuration system.