Build Metadata Reference: add OpenCollective: and Liberapay
Document the new, upcoming OpenCollective:
and Liberapay:
fields. This migrates from LiberapayID:
, which is old, quasi-public numeric ID. It also switches the liberpay link to use the new Liberapay:
values when available but still fallback to LiberapayID:
(handled in jekyll-fdroid).
fdroidserver!754 (merged) fdroidclient!891 (merged) jekyll-fdroid!59 (merged)