* commit 'd504674d':
  ZP-1392 Fix SyncUserInformation for default backend. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-1383 Fix carddav last character of note trimmed. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-1382 Caldav outofoffice tentative workingelsewhere status. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-1379 Undefined offset warnings when impersonating.
  ZP-1291 Exit with 0 if gab2contacts called with help.
  ZP-1291 Exit with 0 if gab-sync called with help.
  ZP-1291 Exit with 0 if z-push-top called with help.
  ZP-1291 Exit with 0 if z-push-admin called with help.
  ZP-1376 Return false in IsRequestMemoryLimitReached if memory_limit set to -1.
  ZP-1377 Fix undefined index warnings in imap backend.
  ZP-1374 Add imap backend location to the include_path when using imap backend.
  ZP-1373 Modify custom header so it matches the apache modphp version.
  ZP-1373 Disable custom remote IP header by default.
  ZP-1375 Change state and log dirs and log rotation ownership to root:z-push on RHEL based operating systems.