Description:
stunnel 5.43 does not accept connections on the server side.
After downgrading to 5.42, the server works normally, using the same config file (server_config.txt attached).
Logs attached are using debug = 7.

Additional info:
* package versions: 5.43 on the server and the client side
* config and log files:
- client_config.txt: the server stunnel config
- server_config.txt: the client stunnel config
- client_log_5-43.txt: client log, unsuccessful connection when the server is in 5.43; there is no log at all on the server side in this case
- client_log_5-42.txt and server_log_5-42.txt: client and server logs, successful connection when the server is in 5.42; the client remains in 5.43, and the config files used are the same.

Step to reproduce:
On the client, open an ssh connection through stunnel:
$ ssh localhost -p 8022

Ssh connection successful when the server is in 5.42

Ssh connection fails when the server is in 5.43; the command results in the following error:
ssh_exchange_identification: read: Connection reset by peer