sdl12-compat: Updated README.

From 66d98a22eb00f51b312ff5551b85a1796d36a1b6 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Fri, 26 Feb 2021 14:19:23 -0500
Subject: [PATCH] Updated README.

---
 README => README.txt | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
 rename README => README.txt (75%)

diff --git a/README b/README.txt
similarity index 75%
rename from README
rename to README.txt
index 286c550..c6f4923 100644
--- a/README
+++ b/README.txt
@@ -3,7 +3,7 @@
 
                                   (SDL)
 
-                            Version 1.2-COMPAT
+                               sdl12-compat
 
 ---
 https://www.libsdl.org/
@@ -18,6 +18,7 @@ you are writing new code, please target SDL 2.0 directly and do not use this
 layer.
 
 If you absolutely must have the real SDL 1.2 ("SDL 1.2 Classic"), please use
-the SDL-1.2 branch at https://hg.libsdl.org/SDL, which occasionally gets
-bug fixes but no formal release. But we strongly encourage you not to do that.
+the SDL-1.2 branch at https://github.com/libsdl-org/SDL-1.2, which
+occasionally gets bug fixes but no formal release. But we strongly encourage
+you not to do that.