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Another James Harvey patch. This one introduces a new button code
called `CURSOR_SELECT', intended for platforms which have a fire
button to go with their cursor keys. (Apparently some Palms do.)
CURSOR_SELECT is not bound to anything on any of the current three
platforms, and therefore no game may rely on it being available.
This checkin adds it in Net as a synonym for 'a', the keyboard-based
rotate-left command.

[originally from svn r5915]

--- a/net.c

+++ b/net.c

@@ -1871,10 +1871,11 @@

         }

         return state;		       /* UI activity has occurred */

     } else if (button == 'a' || button == 's' || button == 'd' ||

-	       button == 'A' || button == 'S' || button == 'D') {

+	       button == 'A' || button == 'S' || button == 'D' ||

+	       button == CURSOR_SELECT) {

 	tx = ui->cur_x;

 	ty = ui->cur_y;

-	if (button == 'a' || button == 'A')

+	if (button == 'a' || button == 'A' || button == CURSOR_SELECT)

 	    button = LEFT_BUTTON;

 	else if (button == 's' || button == 'S')

 	    button = MIDDLE_BUTTON;

--- a/puzzles.h

+++ b/puzzles.h

@@ -43,6 +43,7 @@

     CURSOR_DOWN,

     CURSOR_LEFT,

     CURSOR_RIGHT,

+    CURSOR_SELECT,

     /* made smaller because of 'limited range of datatype' errors. */

     MOD_CTRL       = 0x1000,