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Miheichev Aleksandr Sergeevich
f332caf507
The Hysteria2 URI scheme makes the port optional: "The hostname and optional port of the server. If the port is omitted, it defaults to 443." `Hysteria2Fmt.Resolve` assigned `url.Port` straight through, and `System.Uri` answers -1 for an unregistered scheme that carries no port, so `hysteria2://password@hy2.example/` imported as a profile with `Port = -1`. `ProfileItem.IsValid` rejects any port outside 1..65535, so such a link produced a profile that could never be used, and nothing said why. -1 is the only value that means "the port was omitted"; a ':' with no digits after it maps to -1 as well. An explicit ":0" parses as 0 and keeps the fate it has today - rejected by `IsValid` - rather than being redirected to a server the link never named. `ResolveRealm` takes its port from `HyRealm.RendezvousPort` instead of the URI, so it is unaffected. The added tests cover both spellings of the scheme, with and without a trailing slash, a bare ':', and the resulting profile's validity. Two of them are controls: an explicit port is still preserved, and an explicit ":0" still does not turn into 443.