net/gerbera: Update to 2.0.0

Partially backport commit 3e2f026f2281aa511f1a9106cf48a1f5344ae06b

Changelog:
https://github.com/gerbera/gerbera/releases/tag/v2.0.0

Reference:
https://github.com/gerbera/gerbera/commit/3e2f026f2281aa511f1a9106cf48a1f5344ae06b