Prepare 3.21.1

NEWS

 Overview of changes in 3.21.1
 =============================
 
+* Bugs fixed:
+ 756495 identity: fix renewal requests for kernel keyring based tickets
+ 764157 Port to GTask from GSimpleAsyncResult
+ 765455 goa-daemon --help shows translated characters as question marks on
+        some locales
+
+* Updated translations:
+ Basque
+ Bulgarian
+ Simplified Chinese
+ Friulian
+ Gaelic (Scottish)
+ Hungarian
+ Japanese
+ Persian
+ Portuguese
+
 
 Overview of changes in 3.20.0
 =============================