change default sneak key from RSHIFT to LSHIFT

minetest.conf.example

@@ -16,7 +16,7 @@
 #keymap_left = KEY_KEY_A
 #keymap_right = KEY_KEY_D
 #keymap_jump = KEY_SPACE
-#keymap_sneak = KEY_RSHIFT
+#keymap_sneak = KEY_LSHIFT
 #keymap_inventory = KEY_KEY_I
 #keymap_chat = KEY_KEY_T
 #keymap_rangeselect = KEY_KEY_R

src/defaultsettings.cpp

@@ -36,7 +36,7 @@ void set_default_settings()
 	g_settings.setDefault("keymap_left", "KEY_KEY_A");
 	g_settings.setDefault("keymap_right", "KEY_KEY_D");
 	g_settings.setDefault("keymap_jump", "KEY_SPACE");
-	g_settings.setDefault("keymap_sneak", "KEY_RSHIFT");
+	g_settings.setDefault("keymap_sneak", "KEY_LSHIFT");
 	g_settings.setDefault("keymap_inventory", "KEY_KEY_I");
 	g_settings.setDefault("keymap_chat", "KEY_KEY_T");
 	g_settings.setDefault("keymap_rangeselect", "KEY_KEY_R");