Merge version 1.21.8+rpi1 and 1.21.9 to produce 1.21.9+rpi1

diff --cc debian/changelog
index 1fe493104dadb2b753f7cb983cfa4640434d1ed8,1e4c40ffe1a075127b26227f29a3179aeb193a1b..557a852b30635ac012a7225f701526c01a7e8fe1
--- 1/debian/changelog
--- 2/debian/changelog
+++ b/debian/changelog
@@@ -1,10 -1,30 +1,38 @@@
- dpkg (1.21.8+rpi1) bookworm-staging; urgency=medium
++dpkg (1.21.9+rpi1) bookworm-staging; urgency=medium
 +
 +  [changes brought forward from 1.20.5+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Sun, 02 Aug 2020 12:08:02 +0000]
 +  * Hack up Vendor.pm so it doesn't fail
 +    (see https://lists.debian.org/debian-dpkg/2020/08/msg00004.html )
 +
-  -- Raspbian forward porter <root@raspbian.org>  Sun, 29 May 2022 20:21:55 +0000
++ -- Raspbian forward porter <root@raspbian.org>  Mon, 04 Jul 2022 03:06:27 +0000
++
+ dpkg (1.21.9) unstable; urgency=medium
+ 
+   [ Guillem Jover ]
+   * dpkg-deb: Add support for --threads-max and DPKG_DEB_THREADS_MAX.
+     Prompted by vv221 on IRC.
+   * Perl modules:
+     - Dpkg::Source::Package::V2: Always fix the permissions for upstream
+       tarballs. Closes: #1012195
+     - Dpkg::BuildFlags: Document optimize feature area.
+   * Documentation:
+     - man: Clarify that statoverrides do not need to be known to dpkg.
+       Closes: #1011510
+     - man: Expand Protected and Essential field use cases. Closes: #1008780
+     - doc: Rename frontend.txt to frontend-api.txt.
+     - doc: Move specifications under doc/spec.
+     - man: Add references to rootless-builds.txt spec.
+   * Code internals:
+     - libdpkg: Refactor command actions for compression.
+   * Build system:
+     - Split the test-runner into its own script.
+ 
+   [ Helge Kreutzmann ]
+   * Localization:
+     - Update German man pages translation.
+     - Update German scripts translation.
+ 
+  -- Guillem Jover <guillem@debian.org>  Fri, 01 Jul 2022 11:25:58 +0200
  
  dpkg (1.21.8) unstable; urgency=medium