MINOR: listener/protocol: add proto name in alerts

MINOR: listener/protocol: add proto name in alerts

Frontend and listen sections allow unlimited number of bind statements, it is
often, when there is a bind statement per supported protocol, like below:

listen test
  mode http
  bind quic4@0.0.0.0:443 name quic ssl crt ...
  bind 0.0.0.0:443 name https ssl alpn http/1.1,h2 crt ...
  bind 0.0.0.0:8080 ...
  ...

It seems useful to show corresponded protocol name in alerts and warnings,
when problem occures with port binding, connection resuming or sharding. This
helps to figure out immediately, which bind statement has a wrong setting or
which protocol module is the root cause of the issue.