How does this one suit you?
"
Update the http(s)_port directives protocol= parameter to use
AnyP::ProtocolVersion for internal storage instead of opaque string text.
This both limits the possible parameter values to one of HTTP, HTTP/1.1,
HTTPS or HTTPS/1.1 and ensures that URLs generated from that protocol
parameter value are http:// and https:// URL.
"
Amos
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