Update dependencies and URLs in README file.

The old nsc-puppet-utils module has been split into multiple modules.
The one we use here is the concat module.  Update README file to track
this change.

We are also moving the official Git repository for this module to the
Linköping University GitLab server.

README

 This is a Puppet module for managing Tivoli Storage Manager clients.
-Copyright © 2009-2018 Thomas Bellman, Pär Lindfors.
+Copyright © 2009-2019 Thomas Bellman, Pär Lindfors.
 
 
 ===== LICENSING =====
@@ -24,11 +24,11 @@ If not, see <http://www.gnu.org/licenses/>.
 
 This module depends on these other Puppet modules:
 
-- nsc-puppet-utils
-  Can be found at git://www.nsc.liu.se/~bellman/puppet/nsc-puppet-utils.git.
+- concat
+  Can be found at https://gitlab.liu.se/NSC/puppetmodules/concat.git.
 
 
 ===== OFFICIAL SOURCE =====
 
 The official Git repository for this module is located at
-git://www.nsc.liu.se/~bellman/puppet/tsmclient.git.
+https://gitlab.liu.se/NSC/puppetmodules/tsmclient.