Ubuntu 'select' Fix

- Added a delay before the 'select' call on STDIN, to allow time for
  the data to buffer.  Experimental patch.

src/A3.cpp

@@ -279,6 +279,9 @@ bool A3::is_command (
 // Add an Arg for every word from std::cin.
 void A3::append_stdin ()
 {
+  // Delay, to give it a chance to buffer the input.
+  delay (0.01);
+
   // Use 'select' to determine whether there is any std::cin content buffered
   // before trying to read it, to prevent blocking.
   struct timeval tv;