Dovecot v2.3.7.1 & Pigeonhole v0.5.7.1 released

[Timo Sirainen]

https://dovecot.org/releases/2.3/dovecot-2.3.7.1.tar.gz
https://dovecot.org/releases/2.3/dovecot-2.3.7.1.tar.gz.sig

https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.7.1.tar.gz
https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.7.1.tar.gz.sig

Binary packages in https://repo.dovecot.org/

These releases fix the reported regressions in v2.3.7 & v0.5.7.

Dovecot core:
        - Fix TCP_NODELAY errors being logged on non-Linux OSes
        - lmtp proxy: Fix assert-crash when client uses BODY=8BITMIME
        - Remove wrongly added checks in namespace prefix checking

Pigeonhole:
        - dsync: Sieve script syncing failed if mailbox attributes weren't
          enabled.