Regarding Search functionality and content indexation, documentation for installing and configuring Solr, and subsequent multicore configuration is missing.
There are currently the doc/INSTALL.md and doc/multicore-HOWTO.txt files inside the ezfind extension, but those are meant for Solr to work within ezfind.
A standalone Solr documentation guide is needed also, to work with search and index, (preferably at doc.ez.no itself) that explains the process, from downloading Solr itself to configuring it and putting it to work.