Feature #559

- Added feature #559, which implements a new configuration variable,
  rc.exit.on.missing.db, which causes taskwarrior to exit if the
  rc.data.location is missing (thanks to Sander Marechal).

NEWS

@@ -50,6 +50,8 @@ New configuration options in taskwarrior 2.0.0
     '[...]'.
   - New 'regex' control determines whether substitutions use Regular Expressions
     or simple text patterns.
+  - New 'exit.on.missing.db' control causes an exit if the ~/.task directory
+    (or override) is missing.
 
 Newly deprecated features in taskwarrior 2.0.0