* rewrite of the win32 dedicated console:

1) NET_Sleep() no longer watches for input, Sys_Sleep() added for waiting
     on input.
  2) Added "CtrlHandler" for trapping Ctrl-C and other quit methods not
     handled by signals on windows
  3) Added history support
  4) Added tab completion
  5) Removed automatic cursor/scroll adjustment (too problematic)
  6) Enable mousewheel scrolling
  7) Stop using the InputBuffer for editing

  This seems to work pretty well now, but I jumped the gun on a previous
  commit message by saying you can scroll now without locking up your server.
  That was only true up until the point that a server tried to print to
  the console, at that point it will hang until you release the scroll bar :(
  It may be possible to get around this by using a seperate thread for
  console output, but that's a whole new can of worms.

code/sys/sys_main.c

@@ -573,7 +573,7 @@ void Sys_ParseArgs( int argc, char **argv )
 Sys_SigHandler
 =================
 */
-static void Sys_SigHandler( int signal )
+void Sys_SigHandler( int signal )
 {
 	static qboolean signalcaught = qfalse;
 
@@ -641,6 +641,7 @@ int main( int argc, char **argv )
 
 #ifndef _WIN32
 	// Windows doesn't have these signals
+	// see CON_CtrlHandler() in con_win32.c
 	signal( SIGHUP, Sys_SigHandler );
 	signal( SIGQUIT, Sys_SigHandler );
 	signal( SIGTRAP, Sys_SigHandler );