Constants for parsing Cookie headers, mostly taken from RFC6265 - HTTP State Management Mechanism
http://tools.ietf.org/html/rfc6265
cookie-name = token
cookie-octet = %x21 / %x23-2B / %x2D-3A / %x3C-5B / %x5D-7E
; US-ASCII characters excluding CTLs, ; whitespace DQUOTE, comma, semicolon, ; and backslash
cookie-pair = cookie-name “=” cookie-value
cookie-value = *cookie-octet / ( DQUOTE *cookie-octet DQUOTE )
Version option (not part of RFC6265)
Literals
CTL = <any US-ASCII control character
(octets 0 - 31) and DEL (127)>
Double-quote
; "optional" whitespace
obs-fold = CRLF
separators = “(” | “)” | “<” | “>” | “@”
| "," | ";" | ":" | "\" | <"> | "/" | "[" | "]" | "?" | "=" | "{" | "}" | SP | HT
token = 1*<any CHAR except CTLs or separators>