Apart from Twitter, enable other social media link to be added as part of JUG data about globalwwjugs

[icougil]

Agree with you, we can include a bunch of media platforms, but, which ones?
Could make sense to select 2 or 3 and just render only those?
Otherwise, what can happen is that there is a JUG that is in many social networks that others don't have... and we end up with 1 page where every JUG has 7 or 8 links to show... which is not very practical...
Another option is to simply set a limit (5?) of links and render at most X links.

[FDelporte]

Mastodon is added now, provide the full link please, see for example for @BeJUG:

---
name:     "Belgian Java User Group"
country:  Belgium
website:  https://www.meetup.com/belgian-java-user-group
twitter:  BeJUG
mastodon: https://foojay.social/@BeJUG
location: 50.846816259061896, 4.352442201048654
founded_date: 1996-01-01
---