Release v20.20 to unstable

Signed-off-by: James Valleroy <jvalleroy@mailbox.org>

debian/changelog

@@ -1,3 +1,45 @@
+freedombox (20.20) unstable; urgency=medium
+
+  [ ikmaak ]
+  * Translated using Weblate (Dutch)
+  * Translated using Weblate (Dutch)
+
+  [ Burak Yavuz ]
+  * Translated using Weblate (Turkish)
+
+  [ ssantos ]
+  * Translated using Weblate (Portuguese)
+
+  [ Johannes Keyser ]
+  * Translated using Weblate (German)
+
+  [ Thomas Vincent ]
+  * Translated using Weblate (French)
+
+  [ Michael Breidenbach ]
+  * Translated using Weblate (Swedish)
+
+  [ Fioddor Superconcentrado ]
+  * Translated using Weblate (Spanish)
+  * config: Add user websites as choices for homepage config
+  * config: rename functions (improve readability)
+
+  [ James Valleroy ]
+  * config: Mark test_homepage_field as needs_root
+  * mumble: Implement force upgrade for 1.3.*
+  * upgrades: Hold mumble-server during dist upgrade
+  * locale: Update translation strings
+  * doc: Fetch latest manual
+
+  [ Veiko Aasa ]
+  * apache: Add app name
+  * snapshot: Check that / is a btrfs subvolume before setup
+  * diagnostics: Improve exception handling in app diagnostics
+  * diagnostics: Show app name and fallback to app id if not exist
+  * templates: Make toggle button responsive
+
+ -- James Valleroy <jvalleroy@mailbox.org>  Mon, 14 Dec 2020 19:31:00 -0500
+
 freedombox (20.19) unstable; urgency=medium
 
   [ ikmaak ]

plinth/__init__.py

@@ -3,4 +3,4 @@
 Package init file.
 """
 
-__version__ = '20.19'
+__version__ = '20.20'