GUACAMOLE-929: Merge update copyright date to 2020.

diff --git a/NOTICE b/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/NOTICE
+++ b/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/extensions/guacamole-auth-cas/src/licenses/NOTICE b/extensions/guacamole-auth-cas/src/licenses/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/extensions/guacamole-auth-cas/src/licenses/NOTICE
+++ b/extensions/guacamole-auth-cas/src/licenses/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/extensions/guacamole-auth-duo/src/licenses/NOTICE b/extensions/guacamole-auth-duo/src/licenses/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/extensions/guacamole-auth-duo/src/licenses/NOTICE
+++ b/extensions/guacamole-auth-duo/src/licenses/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/extensions/guacamole-auth-header/src/licenses/NOTICE b/extensions/guacamole-auth-header/src/licenses/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/extensions/guacamole-auth-header/src/licenses/NOTICE
+++ b/extensions/guacamole-auth-header/src/licenses/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-dist/src/licenses/NOTICE b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-dist/src/licenses/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-dist/src/licenses/NOTICE
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-dist/src/licenses/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/extensions/guacamole-auth-ldap/src/licenses/NOTICE b/extensions/guacamole-auth-ldap/src/licenses/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/extensions/guacamole-auth-ldap/src/licenses/NOTICE
+++ b/extensions/guacamole-auth-ldap/src/licenses/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/extensions/guacamole-auth-openid/src/licenses/NOTICE b/extensions/guacamole-auth-openid/src/licenses/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/extensions/guacamole-auth-openid/src/licenses/NOTICE
+++ b/extensions/guacamole-auth-openid/src/licenses/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/extensions/guacamole-auth-quickconnect/src/licenses/NOTICE b/extensions/guacamole-auth-quickconnect/src/licenses/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/extensions/guacamole-auth-quickconnect/src/licenses/NOTICE
+++ b/extensions/guacamole-auth-quickconnect/src/licenses/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/extensions/guacamole-auth-radius/src/licenses/NOTICE b/extensions/guacamole-auth-radius/src/licenses/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/extensions/guacamole-auth-radius/src/licenses/NOTICE
+++ b/extensions/guacamole-auth-radius/src/licenses/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/extensions/guacamole-auth-totp/src/licenses/NOTICE b/extensions/guacamole-auth-totp/src/licenses/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/extensions/guacamole-auth-totp/src/licenses/NOTICE
+++ b/extensions/guacamole-auth-totp/src/licenses/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/guacamole/src/licenses/NOTICE b/guacamole/src/licenses/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/guacamole/src/licenses/NOTICE
+++ b/guacamole/src/licenses/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).