Add support for debian bullseye

Change-Id: Ic7f97ba252191cc2313c2648de0ca90e0ac49ce2

vars/debian-11.yml

@@ -0,0 +1,24 @@
+---
+# Copyright 2021, BBC R&D
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+## APT Cache options
+cache_timeout: 600
+
+uwsgi_bin: '/usr/bin'
+
+uwsgi_distro_packages:
+  - libpython3.9
+  - uwsgi
+  - uwsgi-plugin-python3