Merge changes from apertis/v2020-security into apertis/v2020

debian/changelog

-webkit2gtk (2.30.4-1~deb10u1co1) UNRELEASED; urgency=medium
+webkit2gtk (2.30.4-1~deb10u1co1) apertis; urgency=medium
 
-  * PLEASE SUMMARIZE remaining Apertis changes
+  * Merge from buster-security. Remaining Apertis specific changes:
+    + Explicitly request GLES2.
+    + Disable spellchecking (T2412).
+    + Disable the (gtk2) plugin process.
 
- -- Apertis CI robot <not_a_robot@apertis.org>  Tue, 29 Dec 2020 03:23:05 +0000
+ -- Andrew Lee (李健秋) <andrew.lee@collabora.co.uk>  Tue, 29 Dec 2020 13:33:05 +0800
 
 webkit2gtk (2.30.4-1~deb10u1) buster-security; urgency=medium