[Feature-request] Support for tag downloads on exhentai

[Fukitsu]

I tried to download:
gallery-dl https://exhentai.org/tag/artist:matsumotoke --chapter-range 1-6
but I get:
[gallery-dl][error] No suitable extractor found for 'https://exhentai.org/tag/artist:matsumotoke'

Same with https://exhentai.org/tag/matsumotoke. I thought it was supported already because I think I have downloaded those types of links in the past

[Hrxn]

Is this URL schema new?
I can't tell, but it does not look familiar to me. Because if it is new, it simply is not supported (yet).

[mikf]

Not new, but I've never bothered to write any code to support it because it can always be transformed into a supported search URL:

https://exhentai.org/tag/artist:matsumotoke ->
https://exhentai.org/?f_search=artist%3Amatsumotoke%24