link to source code on about page

README.md

@@ -171,4 +171,5 @@ both for personal/internal and public use, under the following conditions.
   changes available to the public.
 
 The easiest way of making changes available is by maintaining a public fork of
-the Git repository. A tarball is also acceptable.
+the Git repository. A tarball is also acceptable. Please change the `source`
+ref in travelynx.conf if you are using a fork with custom changes.

examples/travelynx.conf

@@ -48,6 +48,16 @@
 		from => die("Changeme!"),
 	},
 
+	# Links to source code and issue tracker shown on the about page.
+	# Please change them if you are using a fork.
+	ref => {
+		# Optional
+		issues => 'https://github.com/derf/travelynx/issues',
+
+		# Mandatory
+		source => 'https://github.com/derf/travelynx',
+	},
+
 	# Secrets used for cookie signing and verification. Must contain at least
 	# one random string. If you specify several strings, the first one will
 	# be used for signing new cookies, and the remaining ones will still be

templates/about.html.ep

@@ -2,6 +2,7 @@
 	<div class="col s12">
 		<a href="https://finalrewind.org/projects/travelynx">travelynx</a> v<%= stash('version') // '???' %><br/>
 		Entwickelt von <a href="https://twitter.com/derfnull">@derfnull</a><br/>
+		<a href="<%= app->config->{ref}{source} // 'https://github.com/derf/travelynx' %>">Quelltext</a> lizensiert unter AGPL v3<br/><br/>
 		Backend:
 		<a href="https://finalrewind.org/projects/Travel-Status-DE-IRIS/">Travel::Status::DE::IRIS</a>
 		v<%= $Travel::Status::DE::IRIS::VERSION %><br/>
@@ -17,7 +18,9 @@
 		<a href="https://finalrewind.org/me/" class="waves-effect waves-light btn"><i class="material-icons left">message</i>Kontakt</a>
 	</div>
 	<div class="col s12 m12 l4 center-align" style="margin-top: 1em;">
-		<a href="https://github.com/derf/travelynx/issues" class="waves-effect waves-light btn"><i class="material-icons left">bug_report</i>Bugs?</a>
+		% if (my $issue_url = app->config->{ref}{issues}) {
+			<a href="<%= $issue_url %>" class="waves-effect waves-light btn"><i class="material-icons left">bug_report</i>Bugs?</a>
+		% }
 	</div>
 	<div class="col s12 m12 l4 center-align" style="margin-top: 1em;">
 		<a href="/changelog" class="waves-effect waves-light btn"><i class="material-icons left">list</i>Changelog</a>