Sometimes not responding on HTTPS

[EpicEric]

Occasionally, my Sandhole instance will stop properly handling HTTP connections. Socket binding still works but no response is returned. On the other hand, SSH connections still work properly.

My guess is on some deadlock related to the ConnectionMap, but as of writing this issue I don't know the root cause.

[EpicEric]

Managed to replicate the issue and the following happens:

• Regular connections don't work and don't timeout normally
• Connections to unknown domains pointing to Sandhole quickly return 404 on HTTP
• Connections to the main domain fail for HTTPS but redirect still for HTTP

This looks like an issue with HTTPS specifically

[EpicEric]

Although much less frequently, there are still HTTPS errors, while HTTP seems to work fine

[EpicEric]

After the changes in cc61e83 I haven't seen any more locks, so I'm optimistically closing this.