Log Message:
Changes 4.10.0:
* imapd.c (main): Open IMAPDEBUGFILE only if it exists already.
(do_expunge): Optionally log deletions.
* pop3dserver.c (cleanup): Optionally log deletions.
* imapd.dist.in (IMAP_MOVE_EXPUNGE_TO_TRASH): Officially document how
IMAPDEBUGFILE works.
* imapscanclient.c: Postpone Y2038K for a while, for uid validities.
* liblock/mail.c (dotlock_exists): Handle getting here because of a
recycled pid.
* unicode/unicode.c (init_default_chset): Handle NULL from setlocale().
* rfc2045/reformime.c (main2): Fixed segfault on some arches from an
initial null given to strtok.
* rfc2045/reformime.c (main2): On ia64 and arm, argv is in readonly memory.
* pop3dserver.c (openpop3dlist): Try a few times to reopen pop3dsizelist
if it fails with ESTALE.
* pop3d.dist.in: Add AUTHSERVICE settings. They've been supported all along.
* Fix gcc 4.6 warnings
* courier-imap.spec.in: switch to systemd. Remove script used when
upgrading from ancient pre-sysconftool versions.
* Fix autoconf warnings.