Wildcard --maphost values (* and *:*) are unreachable from the CLI

[korya]

Problem

hostMapping.Matches explicitly supports wildcard sources:

if r.Src == "*" || r.Src == "*:*" {
    return true
}

and TestHostMapping_Matches covers them. But parseHostMappings requires a : in the source and requires the source port to parse as an integer, so neither form can ever be constructed from the command line.

Reproduction

$ http-assert --maphost '*=127.0.0.1:8791' --assert-ok http://nope.invalid/ok
Error: Invalid value for --maphost flag: [*=127.0.0.1:8791]
[exit=71]

$ http-assert --maphost '*:*=127.0.0.1:8791' --assert-ok http://nope.invalid/ok
Error: Invalid value for --maphost flag: [*:*=127.0.0.1:8791]
[exit=71]

--maphost '*:80=127.0.0.1:8791' works correctly.

Why it went unnoticed

Tests cover the matcher but not the parser→matcher round trip, so the two halves disagree without failing CI.

Affected code

main.go — parseHostMappings vs hostMapping.Matches

Suggested fix

Decide which behaviour is intended. Either allow * / *:* through the parser, or delete the unreachable branches in Matches and their tests.