Only show certain domains on the about screen

src/freedombone-app-dokuwiki

src/freedombone-app-gnusocial

src/freedombone-app-gogs

src/freedombone-app-htmly

src/freedombone-app-hubzilla

src/freedombone-app-irc

src/freedombone-app-mediagoblin

src/freedombone-app-mumble

src/freedombone-app-rss

src/freedombone-app-searx

src/freedombone-app-sip

src/freedombone-app-tahoelafs

src/freedombone-app-tox

src/freedombone-app-xmpp

src/freedombone-controlpanel