If client is sending a lot of commands at once, stop reading input instead of sending "BAD Too long argument".
If client is sending a lot of commands at once, stop reading input instead
of sending "BAD Too long argument".

--HG--
branch : HEAD

jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jkerihuel/dovecot