Htagweb

- better stopServer (if exceptions in killall, it finally stop redys)
- when socket disconnect : try to wait the task cancellation

NOTE : it's not better in gunicorn ... but seems fully ok with uvicorn

**Full Changelog**: https://github.com/manatlan/htagweb/compare/v0.21.0...v0.21.1

- fix: htagserver.IndexApp was in global scope, so its statics were shared with all apps runned thru a htagweb server
- and hopefully : the graceful shutdown whould be there (with redys 0.9.20)

**IMPORTANT** : this version is great .... but with websocket mode, there are troubles... will fix soon!
you can use it in http mode, with `http_only=True`

**Full Changelog**: https://github.com/manatlan/htagweb/compare/v0.19.0...v0.21.0

new:

- time_inactivity (int, default is 0) can be specified in the AppServer constructor, or be overriden in its .handle(). when the process/instance has no activities after this time : it's suicide from itself. By default : it's 0 : so the process lives as long as the server lives (default behaviour of previous htagweb versions)
- add an UT for this

fix :
- time_interaction, defaulted to 60s (and should work has expected, now)

**Full Changelog**: https://github.com/manatlan/htagweb/compare/v0.18.1...v0.19.0

feat:

- time_interaction (int, default is 120s (but may be bugged)) can be specified in the `AppServer` constructor, or be overriden in its `.handle()`. It's the time after which the process is destroyed if it takes more time.
- ms windows compatible ;-)

refacto :

- redesign of hrclient (which now inherit from serverclient), and embed the ws/loop for tag.update feature
- and add a UT to test time_interaction/kill_process

**Full Changelog**: https://github.com/manatlan/htagweb/compare/v0.17.3...v0.18.1

a great version ;-)

Now it's really stable. And auto-kill process if an interaction is greater than 1 minute.

BTW :
- the reboot, doesn't destroy/recreate the redys server (a feature ? ;-) ... so "memory" sessions can persist)

**Full Changelog**: https://github.com/manatlan/htagweb/compare/v0.17.3...v0.18.0