Cleanup: preserve the new file mtimes when installing Postfix.
Ond[m~Yej Lyson[m~[k. File: postfix-install.                                                                                                                                      REVERTED 20160828.

Bugfix (introduced: Postfix 3.0): the makedefs script ignored
readme_directory=pathname overrides. Fix by Todd C. Olson.
File: makedefs.

Bugfix (introduced: Postfix 3.0): the tls_session_ticket_cipher
documentation says aes-256-cbc, but the implementation was
using aes-128-cbc (note that Postfix SMTP server and client
processes have a limited life time).

Bitrot: fixes for incompatible OpenSSL 1.1.0 API changes.
Viktor Dukhovni. Files: posttls-finger/posttls-finger.c,
tls/tls.h, tls/tls_dane.c, tls/tls_verify.c, tls/tls_server.c,
tls/tls_client.c.

Cleanup: disable reuse of ECDH ephemeral keys. Viktor
Dukhovni.  File: tls/tls_misc.h.