[Dovecot] master:Error @2.0 TLS login, "Too large auth data_size sent"

[PGNet Dev]

fyi,

hg log | head -n 7 | grep changeset
  changeset:   10074:1d2d55d9779e

@ LOGIN via Tbird ...

 Oct 15 11:22:35 master: Error: service(imap-login): Too large auth
data_size sent
 Oct 15 11:22:35 imap-login: Info: Disconnected: Shutting down (auth
failed, 1 attempts): user=<blakers at mx.pgnetwork.net>, method=PLAIN,
rip=192.168.1.4, lip=192.168.1.14, TLS