Log Message:
gallery-dl: Update to 1.17.1

Changes:
1.17.1
------
### Additions
 - [architizer] add `project` and `firm` extractors (#1369)
 - [deviantart] add `watch` extractor (#794)
 - [exhentai] support `/tag/` URLs (#1363)
 - [gelbooru_v01] support `drawfriends.booru.org`, `vidyart.booru.org`, and
   `tlb.booru.org` by default
 - [nozomi] support `/index-N.html` URLs (#1365)
 - [philomena] add generalized extractors for philomena sites (#1379)
 - [philomena] support post URLs without `/images/`
 - [twitter] implement `users` option (#1337)
 - implement `parent-metadata` option (#1364)

### Changes
 - [deviantart] revert previous changes to `extra` option (#1356, #1387)

### Fixes
 - [exhentai] improve favorites count extraction (#1360)
 - [gelbooru] update domain for video downloads (#1368)
 - [hentaifox] improve image and metadata extraction (#1366, #1378)
 - [imgur] fix and improve rate limit handling (#1386)
 - [weasyl] improve favorites URL pattern (#1374)
 - use type check before applying `browser` option (#1358)
 - ensure `-s/--simulate` always prints filenames (#1360)

### Removals
 - [hentaicafe]  remove module
 - [hentainexus] remove module
 - [mangareader] remove module
 - [mangastream] remove module