Fix missing addrview error

ZoneMTA wildduck plugin uses wildduck's user handler for address resolution.
A missing field in the projections map caused envelop from addresses
in outgoing messages that matched a wildcard address of the user to
be rejected by ZoneMTA wildduck plugin because of the error thrown in
the user handler of wildduck.

lib/user-handler.js

@@ -132,6 +132,9 @@ class UserHandler {
                 return false;
             }
 
+            // Add addrview to projection as we will need it down further for
+            // matching the right wildcard partial address.
+            projection['addrview'] = true;
             let partialWildcards = tools.getWildcardAddresses(username, domain);
 
             let query = {