If we're connecting to client socket instead of a master socket, log an understandable error message.
If we're connecting to client socket instead of a master socket, log an
understandable error message.

LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot