[FreshRSS] Allow protocol-relative URLs
[FreshRSS] Allow protocol-relative URLs

Quick fix to disable absolutize_url for protocol-relative URLs such as
"//www.example.net" which will pick HTTP or HTTPS automatically

https://github.com/FreshRSS/FreshRSS/commit/be3b07a374c42a7d424b6ae12fd33c70c00c91ff

Alkarex/simplepie,Alkarex/simplepie,Alkarex/simplepie