why my echo server says "echo: http: URL query contains semicolon, which is no longer a supported separator; parts of the query may be stripped when parsed; see golang.org/issue/25192"

[ax-jli]

Issue Description

echo server says this in log:

echo: http: URL query contains semicolon, which is no longer a supported separator; parts of the query may be stripped when parsed; see golang.org/issue/25192

Checklist

• [ ] Dependencies installed
• [ ] No typos
• [ ] Searched existing issues and docs

Expected behaviour

Actual behaviour

Steps to reproduce

Working code to debug

package main

func main() {
}

Version/commit