Adding support for dashed lines using jquery.flot.dashes.js

docs: fixed redirects to panel docs for old location, caused by move in bd414c17

duplicate keys for auth.github for allow_sign_up

influxdb: fixed template variable interpolation of multi valued variables when using raw query editor mode, fixes #8165

Fixes #7914. Fixes #7921

feat: added api health endpoint that does not require auth and never creates sessions, returns db status as well. #3302

Fixes #7822

fix: better error handling / messsage when testing email notification when stmp is not configured, fixes #8093

* refactor util encryption library so it doesn't have to import log

* add util.SplitString to handle space and/or comma-separated config lines

* go fmt

fix: make organisation filter case insensitive