number is hardcoded as it is not always in sync with the PORTVERSION)
- Make telescope control plugin (and Qt5SerialPort dependency) optional
- Remove enforced distfiles checksum recalculation added in r377577: it
turned out that updating distinfo manually is easier and a lot faster
- Replace some options imperative (explicit) handling with helper knobs
- Do not install high resolution textures by default, since they do not
have their prime meridians recalibrated yet while stock textures have
Discussed with: Alexander Wolf (upstream)
66dd5b05c7