Support search via Tor node contact / email address
I'd like to be able to search for Tor nodes by the contact details left on the node. Say I wanted to see every server that Torservers.net runs. Currently, only servers that will return are those with Torservers in the title. It will miss servers with another name (e.g. 'Chomsky) for which @torservers.net is linked as a contact.
Sounds good. This is also related to #5254 (moved) (former GitHub issue 18).
(This was issue 19 in my GitHub repository.)