Address a long standing \todo item that suggested to implement a
read-only interface for the Request::metadata() accessor and deflect to
the internal implementation for the read-write accessor used by pipeline
handlers.
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Acked-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
dce2ef36f2