Checks whether the list-valued header name is present in hdrs, and contains a case-insensitive match for token.
(If name is present in hdrs, then this is equivalent to calling funcheader_contains on its value.)
header name
token to look for
true if the header is present and contains token, false otherwise.
Checks whether the list-valued header name is present in hdrs, and contains a case-insensitive match for token.
(If name is present in hdrs, then this is equivalent to calling funcheader_contains on its value.)