Option Name:store_id_extras
Replaces:
Requires:
Default Value:store_id_extras "%>a/%>A %un %>rm myip=%la myport=%lp"
Suggested Config:

        Specifies a string to be append to request line format for the
        StoreId helper. "Quoted" format values may contain spaces and
        logformat %macros. In theory, any logformat %macro can be used.
        In practice, a %macro expands as a dash (-) if the helper request is
        sent before the required macro information is available to Squid.