A long time ago, web browsers limited themselves to fairly small maximum connection limits. Nowadays, Chrome uses 256 and Firefox uses 900, but we still have a 17 connection limit established in 170917@main. I picked 17 for no other reason than that was what other browsers were doing at the time. That reasoning is as good now as ever, so let's increase.
Well I was planning to create a pull request for this, but I'm unable to do so due to bug #260726.
Pull request: https://github.com/WebKit/WebKit/pull/17197
Committed 267455@main (9dce195e0c90): <https://commits.webkit.org/267455@main> Reviewed commits have been landed. Closing PR #17197 and removing active labels.