add warning about the license excluding use by ST.

ST if free to contact me about licensing the code (or improving their
own code to be USB standard compliant)..

EXCLUDEST.txt

@@ -0,0 +1,29 @@
+/*-
+ * Copyright 2022 John-Mark Gurney.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. If you are STMicroelectronics N.V., one of it's subsidiaries, a
+ *    subsidiary of an owner of STMicroelectronics N.V., or an employee,
+ *    contractor, or agent of any of the preceeding entities, you are not
+ *    allowed to use this code, in either source or binary forms.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */

LICENSE.txt

@@ -9,6 +9,11 @@ manufactured devices.
 Files in the directory loramac are licensed as labeled and/or per
 the LICENSE file in the directory.
 
+A few files have an exclusionary license, a copy of which is in
+(EXCLUDEST.txt), and are labeled as such.  If ST or one of it's agents
+would like to change the copyright of these files, please contact the
+copyright owner as labeled, but likely only John-Mark Gurney.
+
 Most/all the third party files should be on a permission license
 such as BSD, MIT or Apache license.  As usual, it is your responsibility
 to ensure that you follow the terms of the licenses as stated.