Re: [sr-dev] [kamailio/kamailio] extra headers in rtjson (#902)

Overall I am fine with updating to this format (or even support both, old single value and new array), but there are some bits to clarify or sort out:

* what is the problem with '\r\n' in a json value? A SIP header body can have '\r\n', if the next line starts with whitespace or tab. Also, there are some jsonrpc commands that expect a SIP body, where there are end of lines * how is going to work if one wants to add more than one header with the same name? Is json supporting multiple fields with same name in a struct?