Summary:
This includes two fixes: one to ensure that any exception from websocket
upgrade handlers are handled (by destroying the socket). A test case is
added for this.
The other is to ensure verifyClient returns false instead of failing; this
should lead to a better error to the client (Forbidden, rather than just socket
close). This is only tested manually with a curl request.
Test Plan: Added a test case for the more sensitive half of the fix.
Reviewers: georgegevoian
Reviewed By: georgegevoian
Subscribers: georgegevoian
Differential Revision: https://phab.getgrist.com/D4323