uDPRE 0.5.6

• Fix: a world host (or a player hosting the world) that nobody could reach through a forwarded port, while Tailscale or the home
  network worked. Windows' own question when a program first starts ticks only "Private networks" and then blocks that program on
  "public" ones, and many PCs (servers, wired PCs, VPN adapters) are on a "public" network. Allow LAN play... (and uDPRE.exe lan
  firewall) now lets both the game and the world host through on every network and turns off the rules that block them. Press it
  once on the PC that hosts.
• The LAN window shows what Windows Firewall lets through, for the game and the world host and per network kind, in every Windows
  language. It used to say "Allowed" even when a block rule won. Start a world host offers to allow it first.
• World host: it says at start whether Windows Firewall blocks it, and which ports to forward. Use the one that comes with uDPRE
  0.5.6.
• README: Windows Firewall and port forwarding corrected (UDP and TCP, the same port numbers outside and inside).
• 0.5.6 and 0.5.5 players meet: this version changes no game code. Luminescent and Dechibified stay 1.3.5.