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support HTTPS servers with Mozilla's "Modern compatibility" TLS #918
Servers configured with this  don't work, with  do work when importing repositories:
I got the same issue from Packagist.org trying to register a package from a Gitea install with a restrictive (TLS v1.2-only, SNI, HSTS) SSL certificate: https://git.friendi.ca/friendica/php-json-ld
It looks like the GNU TLS library could get an update.
Cloning the repository from my personal machine works fine.