add twitter profile link

_config.yml

@@ -12,6 +12,7 @@ author:
   fedi:
     user: fef
     host: notbird.site
+  twitter: libfef
 sass:
   style: compact
 exclude:

_layouts/default.html

@@ -61,6 +61,14 @@
 							@{{ site.author.fedi.user }}@{{ site.author.fedi.host }}
 						</a>
 					</li>
+					{% if site.author.twitter %}
+						<li>
+							Twitter:
+							<a rel="me" href="https://twitter.com/{{ site.author.twitter }}">
+								@{{ site.author.twitter }}
+							</a>
+						</li>
+					{% endif %}
 					{% if site.hs_url %}
 						<li><a href="{{ site.hs_url }}">Hidden Service mirror</a></li>
 					{% endif %}