Parses header to see if it contains the token token (matched case-insensitively).
Note that this can't be used with lists that have qvalues.
An HTTP header suitable for parsing with funcheader_parse_list
a token
whether or not header contains token
Parses header to see if it contains the token token (matched case-insensitively).
Note that this can't be used with lists that have qvalues.