Don't fold multiple cookies into one header
Don't fold multiple cookies into one header

According to http://tools.ietf.org/html/rfc6265#section-3

>   Origin servers SHOULD NOT fold multiple Set-Cookie header fields into
>   a single header field.  The usual mechanism for folding HTTP headers
>   fields (i.e., as defined in [RFC2616]) might change the semantics of
>   the Set-Cookie header field because the %x2C (",") character is used
>   by Set-Cookie in a way that conflicts with such folding.

This simplifies the code and provides coherent responses when setting
mulmultiple cookies.

nathschmidt/restify-cookies