Backport #18018
When logging in the SessionID should be reset and the session cleaned up.
Also logs the user in on completion of linking account
Signed-off-by: Andrew Thornton <art27@cantab.net>
* refactor routers directory
* move func used for web and api to common
* make corsHandler a function to prohibit side efects
* rm unused func
Co-authored-by: 6543 <6543@obermui.de>
