Server: force block send of pointed_pos_under after predicted node place
Predict wallmounted param2 during node placement prediction.

Also clean up the_game a bit: move node placement prediction to a
separate function.
Don't predict placement of nodes if they would replace a non buildable_to node
Optional dependencies and properly handle mod name conflicts again
Fix documentation for HUD commands in protocol
Fix favorite Server List on Windows
Add header.png and footer.png support for games, and support texture packs via <gameid>_menu_<background/overlay/header/footer>.png
Install menu textures of minetest_game