Update COPYING file with special license requirements for PPPD

COPYING

@@ -9,10 +9,12 @@ have any licensing concerns.
 NuttX
 ^^^^^^
 
-License for NuttX in general (authorship of individual files may vary):
+License for NuttX in general (authorship and copyright dates on
+individual files will vary):
+
 /*************************************************************************
  *
- *   Copyright (C) 2007-2014 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -223,3 +225,44 @@ drivers/video/ov2640
   content of those tables and still retain this BSD license.  I am guessing
   so, but I am not a copyright attorney so you should use this driver in
   products at your own risk.
+
+apps/netutils/pppd
+^^^^^^^^^^^^^^^^^^
+
+  This implementation of PPPD has a license that is mostly compatible the
+  NuttX 3-clause BSD license, but includes a fourth clause that required
+  acknowledgement of Mike Johnson/Mycal Labs if it is built into your
+  product:
+
+      Copyright (C) 2000, Mycal Labs www.mycal.com
+      Copyright (c) 2003, Mike Johnson, Mycal Labs, www.mycal.net
+      All rights reserved.
+
+    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. All advertising materials mentioning features or use of this software
+       must display the following acknowledgement:
+       This product includes software developed by Mike Johnson/Mycal Labs
+       www.mycal.net.
+    4. The name of the author may not be used to endorse or promote
+       products derived from this software without specific prior
+       written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.

arch/arm/include/armv7-m/irq_lazyfpu.h

@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/arm/include/armv7-m/irq.h
+ * arch/arm/include/armv7-m/irq_lazyfpu.h
  *
  *   Copyright (C) 2009, 2011-2012 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>