Define a remote list (and cache results)
My previous PR introduced the use of promote/replace/black lists. This PR allows to define a list on an url, like https://framagit.org/ehvince/mysearch-lists/raw/master/promotelist.txt
This list feature is still to tweak, I see some quirks. Unfortunately I still can't set up my apache to show you live :(
This loading and caching of lists may be done better alongside the config, don't know. I still commit, it's been some months !
Edited by ehvince