Merge pull request #935 from matsduf/update-license

Updates copyright statements (zonemaster-engine)

LICENSE

@@ -1,9 +1,11 @@
 ### Code license
 
-Copyright (c) 2013-2017, IIS (The Internet Foundation in Sweden)
-Copyright (c) 2013-2017, AFNIC
+Copyright (c) The Swedish Internet Foundation (<https://internetstiftelsen.se/en/>)
+Copyright (c) AFNIC (<https://www.afnic.fr/en/>)
 All rights reserved.
 
+Copyright belongs to external contributor where applicable.
+
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
 
@@ -28,8 +30,12 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 ### Documentation license
 
-Copyright (c) 2013-2017, IIS (The Internet Foundation in Sweden)
-Copyright (c) 2013-2017, AFNIC
+Copyright (c) The Swedish Internet Foundation (<https://internetstiftelsen.se/en/>)
+Copyright (c) AFNIC (<https://www.afnic.fr/en/>)
+All rights reserved.
+
+Copyright belongs to external contributor where applicable.
+
 Creative Commons Attribution 4.0 International License
 
 You should have received a copy of the license along with this