Using SourceForge.net CDN for storing the stars catalogs

[alex-w]

Description

This patch is switched to use the CDN of SourceForge.net (23 mirrors) as default storage of our stars catalogs.

Fixes #4412 (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• This change requires a documentation update
• Housekeeping

How Has This Been Tested?

Run Stellarium and download star catalogs

[github-actions]

Great PR! Please pay attention to the following items before merging:

Files matching src/**/*.cpp:

• Are possibly unused includes removed?

This is an automatically generated QA checklist based on modified files.

[gzotti]

I had no problems before, but if this solves the reported issues, looks OK for me.

[10110111]

OK, so stars8 downloaded successfully. I think all the large files should be moved to the new host, so that e.g. #4458 could also be solved.

[alex-w]

I think all the large files should be moved to the new host, so that e.g. #4458 could also be solved.

All our packages are bigger 300 MB and we have already mirror for our packages, so, I against moving all packages to sourceforge.

[github-actions]

Hello @alex-w!

Please check the fresh version (development snapshot) of Stellarium:
https://github.com/Stellarium/stellarium-data/releases/tag/weekly-snapshot

[github-actions]

Hello @alex-w!

Please check the latest stable version of Stellarium:
https://github.com/Stellarium/stellarium/releases/latest