Communities new contact buttons

[lorenzoPrimi]

Add missing social/contacts buttons. Per secondl1ght:

$: secondTwitter = tags['contact:second_twitter'] && tags['contact:second_twitter'];

$: meetup = tags['contact:meetup'] && tags['contact:meetup'];

$: eventbrite = tags['contact:eventbrite'] && tags['contact:eventbrite'];

$: github = tags['contact:github'] && tags['contact:github'];

$: reddit = tags['contact:reddit'] && tags['contact:reddit'];

website, twitter, telegram, discord, youtube are implemented, removed from this list

[lorenzoPrimi]

@salvatoto is this still a thing? I see the various button in the community pages.
f3279b6

[salvatoto]

Only about half of those are implemented.

[lorenzoPrimi]

These are not yet implemented in Android, right?
(so I can tag the issue as low prio)