Show the fd we're sending to master if fd_send() fails.
Show the fd we're sending to master if fd_send() fails.

Distrotech/dovecot,Distrotech/dovecot,damoxc/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,damoxc/dovecot,Distrotech/dovecot,damoxc/dovecot,damoxc/dovecot,Distrotech/dovecot,damoxc/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,Distrotech/dovecot,LTD-Beget/dovecot