[Feature Request]: Add possibility to FULLY REMOVE the User-Agent Header on CONNECT Request

[CabboShiba]

Describe the feature / enhancement and how it would improve things

As now you can set custom headers in the CONNECT request, but if the dictionary is empty it will use default one. It would be better to make that if the dictionary is empty it wont add any header, considering also that sometimes there isn't the User-Agent headers.

I tried to edit a bit the library used but without any success. If you have any suggestion let me know :)__

Describe how your proposal will work, with code and/or pseudo-code

If we pass a empty dictionary in the method WithConnectHeaders, the CONNECT request will not have any headers except for the Host one.

[CabboShiba]

Fixed by editing the FHTTP Lib. Before I couldnt make it working since I had replaced the package with a wrong one.
In order to remove it, edit the FHTTP lib: inside request.go, line 622, remove the following IF condition:

if uaCap, uaLow := r.Header["User-Agent"], r.Header["user-agent"]; uaCap == nil && uaLow == nil {
		r.Header.Set("User-Agent", "Go-http-client/1.1")
	}

Sorry for bad formatting lol.