Replaced COPYING file with Google-compliant LICENSE file

Author: Jay Logue

COPYING

@@ -0,0 +1,268 @@
+
+The openweave-esp32-lwip project is a derivative work of the LwIP project
+(https://savannah.nongnu.org/projects/lwip/).
+
+LwIP is Copyright (c) 2001, 2002 Swedish Institute of Computer Science, and is published
+under a modified BSD license:
+    
+    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. 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.
+
+The openweave-esp32-lwip project also contains software contributed by Espressif Systems
+as part of their ESP-IDF project (https://github.com/espressif/esp-idf).
+
+The ESP-IDF LwIP software is Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD,
+and is published under the Apache 2.0 license (attached below).
+
+Finally, the following files contain work that is contributed by Google as part of the
+OpenWeave project (https://openweave.io/).  These contributions are Copyright 2018 Google LLC,
+and published under the Apache 2.0 license.
+
+    Kconfig
+    core/ipv6/ethip6.c
+    core/ipv6/ip6.c
+    core/ipv6/ip6_route_table.c
+    core/ipv6/nd6.c
+    core/netif.c
+    core/udp.c
+    include/lwip/lwip/ip6_addr.h
+    include/lwip/lwip/ip6_route_table.h
+    include/lwip/lwip/netif.h
+    include/lwip/lwip/opt.h
+    include/lwip/lwip/priv/tcpip_priv.h
+    include/lwip/lwip/tcpip.h
+    include/lwip/lwip/udp.h
+    include/lwip/port/lwipopts.h
+    patches/openweave-esp32-lwip-patch-0001-Add-custom-core-locking.patch
+    patches/openweave-esp32-lwip-patch-0002-Enforce-wlan-buffer-copy.patch
+    patches/openweave-esp32-lwip-patch-0003-Removed-include-lwipopts.h.patch
+    patches/openweave-esp32-lwip-patch-0004-Fix-source-IPv6-addr.patch
+    patches/openweave-esp32-lwip-patch-0005-Fix-ip6_get_subnet_id.patch
+    patches/openweave-esp32-lwip-patch-0006-Send-neighbor-solicitation.patch
+    patches/openweave-esp32-lwip-patch-0007-UDP-interface-binding-support.patch
+    patches/openweave-esp32-lwip-patch-0008-Static-route-table-management.patch
+    patches/openweave-esp32-lwip-patch-0009-Enable-custom-pbufs.patch
+    port/netif/wlanif.c
+
+-----
+
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