Returns the value of the named field parsed as a number.

This form of getHeaderField exists because some connection types (e.g., http-ng) have pre-parsed headers. Classes for that connection type can override this method and short-circuit the parsing.

Parameters:

name		the name of the header field.
Default		the default value.

Returns:  the value of the named field, parsed as an integer. The Default value is returned if the field is missing or malformed.