[stable27] fix(security): Update expiration date in security.txt by @backportbot in https://github.com/nextcloud/server/pull/44536
[stable27] Add retry logic to cover deadlock situations during move operations by @backportbot in https://github.com/nextcloud/server/pull/44550
[stable27] fix(tests): Fix tests when daytime saving time change happened recently by @backportbot in https://github.com/nextcloud/server/pull/44614
[stable27] handle more exceptions in AmazonS3::fopen by @backportbot in https://github.com/nextcloud/server/pull/44508
[stable27] fix(files_sharing): Create passwords when enforced for mail shares by @susnux in https://github.com/nextcloud/server/pull/44569
[stable27] feat(trashbin): Show original location of deleted file by @backportbot in https://github.com/nextcloud/server/pull/44602
[stable27] fix(encryption): Clicking default module in UI sets bogus value by @backportbot in https://github.com/nextcloud/server/pull/44632
[stable27] fix(dav): Fix quota check for chunk upload by @backportbot in https://github.com/nextcloud/server/pull/44656
[stable27] fix(deps): Update phpseclib from 2.0.45 to 2.0.47 by @backportbot in https://github.com/nextcloud/server/pull/44673
[stable27] fix(3rdparty): Add a CI job to check 3rdparty integrity by @backportbot in https://github.com/nextcloud/server/pull/44690
[stable27] enh: Send empty expireDate when not expireDate set by @backportbot in https://github.com/nextcloud/server/pull/44491
[stable27] fix: Fix avatar images by @Pytal in https://github.com/nextcloud/server/pull/44739
[stable27] fix: use proper jailed patch in watcher by @backportbot in https://github.com/nextcloud/server/pull/44749
[stable27] perf: Avoid updating the folder size if we know the size difference by @backportbot in https://github.com/nextcloud/server/pull/44680
[stable27] fix(LDAP): escape DN on check-user by @backportbot in https://github.com/nextcloud/server/pull/44766
[stable27] Fix opening "Remote shares" dialog even if Notifications is available by @danxuliu in https://github.com/nextcloud/server/pull/44823
[stable27] fix(files): Allow to pick directories using the file reference picker by @susnux in https://github.com/nextcloud/server/pull/44803
[stable27] fix(share): Send correct share attributes upon share creation by @backportbot in https://github.com/nextcloud/server/pull/44499
[stable27] Fix/caldav/eventcomparisionservice uses wrong array comparison by @backportbot in https://github.com/nextcloud/server/pull/44472
[stable27] fix(files): Also skip cross storage move with access control by @backportbot in https://github.com/nextcloud/server/pull/44892
[stable27] disable the internal s3sdk multi part copy logic by @backportbot in https://github.com/nextcloud/server/pull/44052
[stable27] fix(files): Also restore shares after ownership transfer for object storage by @backportbot in https://github.com/nextcloud/server/pull/44920
27.1.9 RC1 by @Altahrim in https://github.com/nextcloud/server/pull/44875

Full Changelog: https://github.com/nextcloud/server/compare/v27.1.8...v27.1.9rc1