Add support for setting a human-friendly SITE_NAME

snikket_web/templates/about.html

@@ -9,13 +9,14 @@
 		<h1>{% trans %}About Snikket{% endtrans %}</h1>
 		<p>{% trans snikket_url="https://snikket.org" %}To learn more about Snikket, visit the <a href="{{ snikket_url}}">Snikket website</a>.{% endtrans %}</p>
 		<h2>{% trans %}About this Server{% endtrans %}</h2>
-		<p>{% trans domain=config["SNIKKET_DOMAIN"] %}This is the Snikket server <em>{{ domain }}</em>.{% endtrans %}</p>
+		<p>{% trans site_name=config["SITE_NAME"] %}This is the Snikket server <em>{{ site_name }}</em>.{% endtrans %}</p>
 		<h3>{% trans %}Licenses{% endtrans %}</h3>
 		<p>{% trans agpl_url="https://www.gnu.org/licenses/agpl.html" %}The web portal software is licensed under the terms of the <a href="{{ agpl_url }}">Affero GNU General Public License, version 3.0 or later</a>. The full terms of the license can be reviewed using the aforementioned link.{% endtrans %}</p>
 		<p>{% trans source_url="https://github.com/snikket-im/snikket-web-portal/" %}The source code of the web portal can be downloaded and viewed in <a href="{{ source_url }}">its GitHub repository</a>.{% endtrans %}</p>
 		<p>{% trans source_url="https://material.io/resources/icons/", apache20_url="https://www.apache.org/licenses/LICENSE-2.0.txt" %}The icons used in the web portal are <a href="{{ source_url }}">Google’s Material Icons</a>, made available by Google under the terms of the <a href="{{ apache20_url }}">Apache 2.0 License</a>.{% endtrans %}</p>
 		<h3>{% trans %}Software Versions{% endtrans %}</h3>
-		<pre>Snikket Server (unknown)
+		<pre>Snikket Server
+Domain: {{ config["SNIKKET_DOMAIN"] }}
 Snikket Web Portal ({{ version }})
 {%- if extra_versions -%}
 {% for name, version in extra_versions.items() %}