Returns true if HTTP header field name |name| of length |len| is valid according to http://tools.ietf.org/html/rfc7230#section-3.2
Because this is a header field name in HTTP2, the upper cased alphabet is treated as error.
See Implementation
Returns true if HTTP header field name |name| of length |len| is valid according to http://tools.ietf.org/html/rfc7230#section-3.2
Because this is a header field name in HTTP2, the upper cased alphabet is treated as error.