Stale sessions are not being reaped by the server

[mbyczkowski]

We've had a number of reports that when a client is terminated, the server still shows old sessions as active. No actual repro, yet.

[doodles526]

@mbyczkowski Are these specifically reffing the SSH session type?

[mbyczkowski]

@doodles526 yes, that's what I have noticed on wormhole servers under load with multiple clients (and each with multiple connections/streams) opened. Hopefully, I'll be able to provide more info. Should figure out how to simulate this better.