Add MIT.txt to the package for MIT-licensed code

Some of the code in librpminspect is adapted from examples on this
blog post:

    https://begriffs.com/posts/2019-05-23-unicode-icu.html

The author has provided that code under the MIT license.  The
explanation, email, and a copy of the license are provided in the
MIT.txt file.

Signed-off-by: David Cantrell <[email protected]>

Author: dcantrell

MIT.txt

@@ -0,0 +1,59 @@
+Some of the source in lib/inspect_unicode.c is derived from code
+examples shown on this blog post:
+
+    https://begriffs.com/posts/2019-05-23-unicode-icu.html
+
+The author states the source code examples on that post are available
+under the MIT license, which is noted below.  Here is the email from
+the author indicating the license for the source code examples on the
+blog post:
+
+
+Date: Sun, 31 Oct 2021 14:43:54 -0500
+From: Joe Nelson <[email protected]>
+To: David Cantrell <[email protected]>
+Subject: Re: Code from your Unicode post in 2019
+Content-Type: text/plain; charset=utf-8
+Content-Disposition: inline
+
+> Just wanted to say thanks for the detailed write up here:
+> 
+>     https://begriffs.com/posts/2019-05-23-unicode-icu.html
+> 
+> About ICU and some specific examples.  It has been helpful for me as I
+> have been working on some key Unicode errors.
+
+Hi David, glad to hear it's helpful!
+
+> I have used some lines from your examples here and there in my code,
+> but I noticed you don't have any license or copyright notice on your
+> code examples.  Are these available under any particular license or
+> have you given it any thought?
+
+Sure, you can use the code snippets under the MIT license. The text of
+the articles, though, is not open source.
+
+
+---------------------------------------------------------------------------
+
+Copyright (c) 2019 Joe Nelson <[email protected]>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice (including the
+next paragraph) shall be included in all copies or substantial
+portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

rpminspect.spec.in

@@ -8,7 +8,7 @@ Group:          Development/Tools
 # rpminspect(1) command line tool is licensed under the GPLv3+.  And
 # the rpminspect-data-generic package is licensed under the CC-BY-4.0
 # license.
-License:        GPLv3+ and LGPLv2+ and ASL 2.0 and CC-BY
+License:        GPLv3+ and LGPLv2+ and ASL 2.0 and MIT and CC-BY
 URL:            https://github.com/rpminspect/rpminspect
 Source0:        https://github.com/rpminspect/rpminspect/releases/download/v%{version}/%{name}-%{version}.tar.xz
 Source1:        https://github.com/rpminspect/rpminspect/releases/download/v%{version}/%{name}-%{version}.tar.xz.asc
@@ -152,7 +152,7 @@ control files.
 
 
 %files -n librpminspect
-%license COPYING.LIB LICENSE-2.0.txt
+%license COPYING.LIB LICENSE-2.0.txt MIT.txt
 %{_libdir}/librpminspect.so.*