This functnion is functionally equivalent to the standard library
cgi parse_qsl, except that it is written in C and is
much faster.
Parse a query string given as a string argument (data of type
application/x-www-form-urlencoded). Data are
returned as a list of name, value pairs.
The optional argument keep_blank_values is a flag indicating
whether blank values in URL encoded queries should be treated as blank
strings. A true value indicates that blanks should be retained as
blank strings. The default false value indicates that blank values
are to be ignored and treated as if they were not included.
Note: The strict_parsing argument is not yet implemented.