jf-actvitity: functioning route, ombi fixes

forgot to switch branches before doing a fix for #455, so it's in here
too. OmbiUserByJfID/getOmbiUser takes an optional email *string, to
optionally pass an override email address to search with, used when
changing it.

logmessages/logmessages.go

@@ -333,6 +333,9 @@ const (
 
 	// usercache.go
 	CacheRefreshCompleted = "Usercache refreshed, %d in %.2fs (%f.2u/sec)"
+
+	// Other
+	GotNEntries = "got %d entries"
 )
 
 const (