SDL_net: LICENSE.txt: changed this to make GitHub's UI happy.

From 72ccc7a30874e0699aae95df7ef2cac2a16d92b0 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Fri, 17 Jun 2022 19:21:18 -0400
Subject: [PATCH] LICENSE.txt: changed this to make GitHub's UI happy.

No change to the actual license, just reformatted so its detected as zlib.
---
 COPYING.txt | 20 --------------------
 LICENSE.txt | 18 ++++++++++++++++++
 2 files changed, 18 insertions(+), 20 deletions(-)
 delete mode 100644 COPYING.txt
 create mode 100644 LICENSE.txt

diff --git a/COPYING.txt b/COPYING.txt
deleted file mode 100644
index 36ac5cb..0000000
--- a/COPYING.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
-  SDL_net:  An example cross-platform network library for use with SDL
-  Copyright (C) 1997-2022 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
-  arising from the use of this software.
-
-  Permission is granted to anyone to use this software for any purpose,
-  including commercial applications, and to alter it and redistribute it
-  freely, subject to the following restrictions:
-
-  1. The origin of this software must not be misrepresented; you must not
-     claim that you wrote the original software. If you use this software
-     in a product, an acknowledgment in the product documentation would be
-     appreciated but is not required.
-  2. Altered source versions must be plainly marked as such, and must not be
-     misrepresented as being the original software.
-  3. This notice may not be removed or altered from any source distribution.
-*/
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..728a3d7
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,18 @@
+Copyright (C) 1997-2022 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
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+  
+1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgment in the product documentation would be
+   appreciated but is not required. 
+2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+