wiki-login URLs with symbols like `/`, `?`, `&` and https-only

obfuscated wiki's userpage-title URLs, which containing symbols like `/`, `?`, `&` and https-only (without redirect from http-counterpart) are being used as actual URLs on related services (like IRC)

leads to wrong URLs, henceforth 404s

example: http://indiewebcamp.com/User:Unicyclic.com_mal ->
-> http://indiewebcamp.com/irc/2016-04-08#t1460112925864

possible solution?

> [# 10:41 aaronpk you can hide the default title on your user page and add your own](http://indiewebcamp.com/irc/2016-04-08#t1460137303253)
> [# 10:42 aaronpk add `__NOTITLE__` in the page then just use regular header syntax](http://indiewebcamp.com/irc/2016-04-08#t1460137329513)

No repository files, tests, or implementation entry points are identified in the issue. Start by determining where the wiki userpage-title URLs are generated or obfuscated and how related-service links consume them; done means URLs containing the listed symbols and HTTPS-only URLs resolve to the intended pages without 404s.

Written by the indexing model from the issue text.