doc/Holepunch-Protocol.txt

+             Bird's Hole Punching Protocol
+
+
+Hole punch - a mechanism to bypass a firewall
+Server     - a third party which is not behind a firewall
+Client     - anything contacting the server
+Magic      - the four bytes 00 52 EB 11
+Address    - an IPv4 address
+
+
+                  0 1 2 3 4 5 6 7 8  9
+                 +-------+-------+----+
+                 | Magic |Address|Port|
+                 +-------+-------+----+
+                      Relay Packet
+
+
+A client that expects to be the target of a hole punch
+must contact the server frequently, to keep a UDP
+"connection" open, so that the server may relay hole
+punching requests to them.
+
+A client makes a hole punching request to another client
+by sending a Relay Packet to the server. The server then
+sends another Relay Packet to the client described by the
+first packet. The second packet is filled with the source
+address and port of the first packet.
+
+Once a client receives a Relay Packet, this protocol's
+purpose is fulfilled and the client is aware that another
+client requests a hole punch.
+
+
+vim: noai

libs/DLL-README.txt

+# SRB2Kart - Which DLLs do I need to bundle?
+
+Updated 8/23/2020 (v1.3)
+
+Here are the required DLLs, per build. For each architecture, copy all the binaries from these folders:
+
+* libs\dll-binaries\[i686/x86_64]
+* libs\SDL2\[i686/x86_64]...\bin
+* libs\SDL2_mixer\[i686/x86_64]...\bin
+
+and don't forget to build r_opengl.dll for srb2dd.
+
+## srb2kart, 32-bit
+
+* libs\dll-binaries\i686\exchndl.dll
+* libs\dll-binaries\i686\libgme.dll
+* libs\dll-binaries\i686\discord-rpc.dll
+* libs\dll-binaries\i686\mgwhelp.dll (depend for exchndl.dll)
+* libs\SDL2\i686-w64-mingw32\bin\SDL2.dll
+* libs\SDL2_mixer\i686-w64-mingw32\bin\*.dll (get everything)
+
+## srb2kart, 64-bit
+
+* libs\dll-binaries\x86_64\exchndl.dll
+* libs\dll-binaries\x86_64\libgme.dll
+* libs\dll-binaries\x86_64\discord-rpc.dll
+* libs\dll-binaries\x86_64\mgwhelp.dll (depend for exchndl.dll)
+* libs\SDL2\x86_64-w64-mingw32\bin\SDL2.dll
+* libs\SDL2_mixer\x86_64-w64-mingw32\bin\*.dll (get everything)

libs/SDL2/BUGS.txt

 
-Bugs are now managed in the SDL bug tracker, here:
+Bugs are now managed in the SDL issue tracker, here:
 
-    https://bugzilla.libsdl.org/
+    https://github.com/libsdl-org/SDL/issues
 
 You may report bugs there, and search to see if a given issue has already
  been reported, discussed, and maybe even fixed.
@@ -11,6 +11,6 @@ You may also find help at the SDL forums/mailing list:
 
     https://discourse.libsdl.org/
 
-Bug reports are welcome here, but we really appreciate if you use Bugzilla, as
- bugs discussed on the mailing list may be forgotten or missed.
+Bug reports are welcome here, but we really appreciate if you use the issue
+ tracker, as bugs discussed on the mailing list may be forgotten or missed.
 

libs/SDL2/COPYING.txt

 
 Simple DirectMedia Layer
-Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
   
 This software is provided 'as-is', without any express or implied
 warranty.  In no event will the authors be held liable for any damages

libs/SDL2/docs/README-porting.md

@@ -13,7 +13,7 @@ There are two basic ways of building SDL at the moment:
 
 1. The "UNIX" way:  ./configure; make; make install
 
-   If you have a GNUish system, then you might try this.  Edit configure.in,
+   If you have a GNUish system, then you might try this.  Edit configure.ac,
    take a look at the large section labelled:
 
 	"Set up the configuration based on the host platform!"