- Added builtin command detection

- Now allows override of due/overdue coloration

src/parse.cpp

@@ -348,6 +348,18 @@ static bool validCommand (std::string& input)
   return true;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+static bool validBuiltinCommand (std::string& input)
+{
+  std::string copy = input;
+  guess ("command", commands, copy);
+  if (copy == "")
+      return false;
+
+  input = copy;
+  return true;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 static bool validSubstitution (
   std::string& input,