Possibility to add whole HttpHeader to platform options, not only by name/value as separate strings

[Borod4r]

It is a pretty simple feature request. Sometimes it is just more convenient to add HttpHeader instance to platform options instead of decomposing it to name and value strings.

What I'm proposing is to add this method to HttpHeaderData class:

public void Add(HttpHeader header) { httpHeaders.Add(header); }

Usually, I'm just modifying your sources for similar needs but then it's inconvenient to keep track of them during upgrades.