FeedNotifier cannot connect to servers not supporting TLS 1.0

[AndreKR]

If I try to connect to a server that does not support TLS 1.0, I get the error message:

The URL entered does not appear to be a valid RSS/Atom feed.

This is probably also the cause in these issues:
#98 - https://www.ssllabs.com/ssltest/analyze.html?d=www.upwork.com - only TLS 1.2 enabled
#93 - https://www.ssllabs.com/ssltest/analyze.html?d=xkcd.com - only TLS 1.2 enabled

[Local9]

Now this is something I did not check and can confirm I have the same issue.

[Catzilla]

I have the same issue with this feed:
https://bartervg.com/u/1e58/o/rss/
Without HTTPS this feed works fine.
According to SSL Labs, only TLS 1.2 and 1.3 are enabled.

[AndreKR]

This patched version works: #98 (comment)