[releng] Update year in copyright notices for features

Bump upper end of range to 2020.

These copyright notices are user-facing; they're visible in several
dialogs in Eclipse. It is strange or even misleading to see a copyright
notice for JGit saying "2005, 2010" when there have been *many*
developments in the past ten years.

Change-Id: Idaa6244b2b3d9cecb29cc690085f8d008195cf12
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>

org.eclipse.jgit.packaging/org.eclipse.jgit.feature/feature.properties

@@ -20,7 +20,7 @@ A pure Java implementation of the Git version control system.\n
 
 # "copyright" property - text of the "Feature Update Copyright"
 copyright=\
-Copyright (c) 2005, 2010 Shawn Pearce, Robin Rosenberg, et.al.\n\
+Copyright (c) 2005, 2020 Shawn Pearce, Robin Rosenberg, et.al.\n\
 All rights reserved. This program and the accompanying materials\n\
 are made available under the terms of the Eclipse Distribution License v1.0\n\
 which accompanies this distribution, and is available at\n\

org.eclipse.jgit.packaging/org.eclipse.jgit.http.apache.feature/feature.properties

@@ -20,7 +20,7 @@ Optional Http support using Apache httpclient.\n
 
 # "copyright" property - text of the "Feature Update Copyright"
 copyright=\
-Copyright (c) 2005, 2013 Shawn Pearce, Robin Rosenberg, et.al.\n\
+Copyright (c) 2005, 2020 Shawn Pearce, Robin Rosenberg, et.al.\n\
 All rights reserved. This program and the accompanying materials\n\
 are made available under the terms of the Eclipse Distribution License v1.0\n\
 which accompanies this distribution, and is available at\n\

org.eclipse.jgit.packaging/org.eclipse.jgit.junit.feature/feature.properties

@@ -20,7 +20,7 @@ description=JUnit test support for JGit
 
 # "copyright" property - text of the "Feature Update Copyright"
 copyright=\
-Copyright (c) 2010, Matthias Sohn <matthias.sohn@sap.com>\n\
+Copyright (c) 2010, 2020 Matthias Sohn <matthias.sohn@sap.com>\n\
 and other copyright owners as documented in the project's IP log.\n\
 All rights reserved. This program and the accompanying materials\n\
 are made available under the terms of the Eclipse Distribution License v1.0\n\

org.eclipse.jgit.packaging/org.eclipse.jgit.lfs.feature/feature.properties

@@ -20,7 +20,7 @@ Optional LFS support.\n
 
 # "copyright" property - text of the "Feature Update Copyright"
 copyright=\
-Copyright (c) 2015, Matthias Sohn et.al.\n\
+Copyright (c) 2015, 2020 Matthias Sohn et.al.\n\
 All rights reserved. This program and the accompanying materials\n\
 are made available under the terms of the Eclipse Distribution License v1.0\n\
 which accompanies this distribution, and is available at\n\

org.eclipse.jgit.packaging/org.eclipse.jgit.pgm.feature/feature.properties

@@ -20,7 +20,7 @@ Command line interface for a pure Java implementation of the Git version control
 
 # "copyright" property - text of the "Feature Update Copyright"
 copyright=\
-Copyright (c) 2005-2012 Shawn Pearce, Robin Rosenberg, et.al.\n\
+Copyright (c) 2005, 2020 Shawn Pearce, Robin Rosenberg, et.al.\n\
 All rights reserved. This program and the accompanying materials\n\
 are made available under the terms of the Eclipse Distribution License v1.0\n\
 which accompanies this distribution, and is available at\n\

org.eclipse.jgit.packaging/org.eclipse.jgit.source.feature/feature.properties

@@ -21,7 +21,7 @@ Source code for the support for PDE's JUnit runner for a Target Platform\n
 
 # "copyright" property - text of the "Feature Update Copyright"
 copyright=\
-Copyright (c) 2005, 2010 Shawn Pearce, Robin Rosenberg, et.al.\n\
+Copyright (c) 2005, 2020 Shawn Pearce, Robin Rosenberg, et.al.\n\
 All rights reserved. This program and the accompanying materials\n\
 are made available under the terms of the Eclipse Distribution License v1.0\n\
 which accompanies this distribution, and is available at\n\

org.eclipse.jgit.packaging/org.eclipse.jgit.ssh.apache.feature/feature.properties

@@ -20,7 +20,7 @@ Ssh support using Apache MINA sshd.\n
 
 # "copyright" property - text of the "Feature Update Copyright"
 copyright=\
-Copyright (c) 2018 Thomas Wolf and others.\n\
+Copyright (c) 2018, 2020 Thomas Wolf and others.\n\
 All rights reserved. This program and the accompanying materials\n\
 are made available under the terms of the Eclipse Distribution License v1.0\n\
 which accompanies this distribution, and is available at\n\