[ticket/11799] Send anti abuse headers in "new password" emails.

PHPBB3-11799
Merge remote-tracking branch 'bantu/ticket/11799' into develop-olympus

* bantu/ticket/11799:
  [ticket/11799] Send anti abuse headers in "new password" emails.
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [ticket/11799] Send anti abuse headers in "new password" emails.
Merge remote-tracking branch 'upstream/develop' into develop