Overview of changes in 3.21.4
=============================

* Bugs fixed:
 756431 identity: Don't leak the invocation when handling SignIn
 764157 Port to GTask from GSimpleAsyncResult
 766733 kerberos, telepathy: Stopping goa-daemon removes account or expires
        credentials
 767914 Offer a simple mechanism to introspect the available providers and
        services
 768808 identity: Clean up the credential cache and don't keep trying to sign
        in if we encounter a failure
 768845 kerberos: Don't leak the GSimpleAsyncResult and object_path when
        signing in

* Updated translations:
 Indonesian
 Polish
 Slovak
 Vietnamese