Add url_rewrite_extras and store_id_extras for redirector and store_id helpers

Add url_rewrite_extras and store_id_extras for redirector and store_id helpers

The url_rewrite_extras/store_id_extras is a "quoted string" with logformat
%macro support. It is used to modify the request line for redirector and
storeId helpers.

The url rewrite and store_id helpers request format now is:
       url [<SP> extras]
and the default value for extras is:
  "%>a/%>A %un %>rm myip=%la myport=%lp"

Example usage:
   url_rewrite_extras "Note1=%{Note1}note Note2=%{Note2}note"

This is a Measurement Factory project.