Prepare changelog for 0.15.1

changelog/unreleased/issue-3750

@@ -1,10 +0,0 @@
-Bugfix: Remove `b2_download_file_by_name: 404` warning from B2 backend
-
-In some cases the B2 backend could print `b2_download_file_by_name: 404: :
-b2.b2err` warnings. These are only debug messages and can be safely ignored.
-
-Restic now uses an updated library for accessing B2, which removes the warning.
-
-https://github.com/restic/restic/issues/3750
-https://github.com/restic/restic/issues/4144
-https://github.com/restic/restic/pull/4146

changelog/unreleased/issue-4147

@@ -1,7 +0,0 @@
-Bugfix: Make `prune --quiet` not print progress bar
-
-A regression in restic 0.15.0 caused `prune --quiet` to show a progress bar
-while deciding how to process each pack files. This has now been fixed.
-
-https://github.com/restic/restic/issues/4147
-https://github.com/restic/restic/pull/4153

changelog/unreleased/pull-4152

@@ -1,19 +0,0 @@
-Enhancement: Ignore empty lock files
-
-With restic 0.15.0 the checks for stale locks became much stricter than before.
-In particular, empty or unreadable locks were no longer silently ignored. This
-made restic to complain with `Load(<lock/1234567812>, 0, 0) returned error,
-retrying after 552.330144ms: load(<lock/1234567812>): invalid data returned`
-and fail in the end.
-
-The error message is now clarified and the implementation changed to ignore
-empty lock files which are sometimes created as the result of a failed uploads
-on some backends.
-
-Please note that unreadable lock files still have to cleaned up manually. To do
-so, you can run `restic unlock --remove-all` which removes all existing lock
-files. But first make sure that no other restic process is currently using the
-repository.
-
-https://github.com/restic/restic/issues/4143
-https://github.com/restic/restic/pull/4152

changelog/unreleased/pull-4163

@@ -1,13 +0,0 @@
-Bugfix: Make `self-update --output` work with new filename on Windows
-
-Since restic 0.14.0 the `self-update` command did not work when a custom output
-filename was specified via the `--output` option. This has now been fixed.
-
-As a workaround, either use an older restic version to run the self-update or
-create an empty file with the output filename before updating e.g. using CMD:
-
-`type nul > new-file.exe`
-`restic self-update --output new-file.exe`
-
-https://github.com/restic/restic/pull/4163
-https://forum.restic.net/t/self-update-windows-started-failing-after-release-of-0-15/5836

changelog/unreleased/pull-4167

@@ -1,6 +0,0 @@
-Bugfix: Add missing ETA in `backup` progress bar
-
-A regression in restic 0.15.0 caused the ETA to be missing from the progress
-bar displayed by the `backup` command. This has now been fixed.
-
-https://github.com/restic/restic/pull/4167