Accept "domains" when filtering

[fregante]

There's an issue with the filtering because these two searches are empty:

• https://justdeleteme.xyz/#www.youtube.com
• https://justdeleteme.xyz/#youtube.com

while this works:

• https://justdeleteme.xyz/#youtube

It'd be great to use the domains array on the website’s search as well in order to find them easily, not just by name.

Originally posted in #1772 (comment)

[fregante]

I'd love to see some "exact" searches as well.

For example https://justdeleteme.xyz/#github.com should only show GitHub.com, not BountySource (which I don't know why appears)

Maybe a dedicated search could be added: https://justdeleteme.xyz/?domain=github.com

[tupaschoal]

Bountysource's URL is on github, that's probably why