Represents an HTTP header field.
The HTTP header fields follow the same generic format as that given in Section 3.1 of RFC 822. Each header field consists of a name followed by a colon (":") and the field value. Field names are case-insensitive. The field value MAY be preceded by any amount of LWS, though a single SP is preferred.
message-header = field-name ":" [ field-value ] field-name = token field-value = *( field-content | LWS ) field-content = <the OCTETs making up the field-value and consisting of either *TEXT or combinations of token, separators, and quoted-string>
@author Remy Maucherat
@author Mike Bowler
@author Oleg Kalnichevski
@version $Revision: 604625 $ $Date: 2007-12-16 15:11:11 +0100 (Sun, 16 Dec 2007) $