use Set() instead of Add() when attaching additional headers
@@ -86,7 +86,7 @@ func NewHTTPS2HTTPPlugin(params map[string]string) (Plugin, error) {
req.Host = p.hostHeaderRewrite
}
for k, v := range p.headers {
- req.Header.Add(k, v)
+ req.Header.Set(k, v)
}
},
}
