gdk: merge all 3.x changes to gdk_keysym_to_unicode_tab[] in gdkkeyuni.c

gdk/gdkkeyuni.c

@@ -830,6 +830,20 @@ static const struct {
 
   /* Following items added to GTK, not in the xterm table */
 
+  /* A few ASCII control characters */
+#ifndef GDK_WINDOWING_WIN32
+  { 0xFF08 /* Backspace */, '\b' },
+  { 0xFF09 /* Tab       */, '\t'  },
+#endif
+
+  { 0xFF0A /* Linefeed  */, '\n' },
+  { 0xFF0B /* Vert. Tab */, '\v' },
+
+#ifndef GDK_WINDOWING_WIN32
+  { 0xFF0D /* Return    */, '\r' },
+  { 0xFF1B /* Escape    */, '\033' },
+#endif
+
   /* Numeric keypad */
 
   { 0xFF80 /* Space     */, ' ' },
@@ -852,6 +866,10 @@ static const struct {
   { 0xFFBD /* Equal */, '=' },  
 
   /* End numeric keypad */
+
+#ifndef GDK_WINDOWING_WIN32
+  { 0xFFFF /* Delete */, '\177' }
+#endif
 };
 
 /**