message: workflows: enable Passthrough plugin for deb/rpm
  I think it's mostly confusing if that's not available, so I suggest to
  add it by default.
diff: @@ -171,7 +171,7 @@ jobs:
  with:
  submodules: recursive
  - name: configure
  - run: cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_BACKEND=OFF -DBUILD_SHARED_LIBS=ON -DCMAKE_INSTALL_PREFIX=install -Bbuild/release -H.
  + run: cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_BACKEND=OFF -DBUILD_SHARED_LIBS=ON -DENABLE_MAVLINK_PASSTHROUGH=1 -DCMAKE_INSTALL_PREFIX=install -Bbuild/release -H.
  - name: build
  run: cmake --build build/release --target install -- -j2
  - name: Package
  @@ -199,7 +199,7 @@ jobs:
  with:
  submodules: recursive
  - name: configure
  - run: cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_BACKEND=OFF -DBUILD_SHARED_LIBS=ON -DCMAKE_INSTALL_PREFIX=install -Bbuild/release -H.
  + run: cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_BACKEND=OFF -DBUILD_SHARED_LIBS=ON -DENABLE_MAVLINK_PASSTHROUGH=1 -DCMAKE_INSTALL_PREFIX=install -Bbuild/release -H.
  - name: build
  run: cmake --build build/release --target install -- -j2
  - name: Package
  