doveadm-server: Don't continue handling commands if input stream is already closed. This fixes trying to handle extra input from previous dsync command.
doveadm-server: Don't continue handling commands if input stream is already closed.
This fixes trying to handle extra input from previous dsync command.

damoxc/dovecot,damoxc/dovecot,damoxc/dovecot,damoxc/dovecot,damoxc/dovecot