iproute2: Update to version 5.16.0

iproute2: Update to version 5.16.0

- Update from 5.15.0 to 5.16.0
- Update of rootfile
   routef has been removed
    Commit message - This script is old and limited to IPv4. Using ip route command
                     directly is better option.
   rtpr has been removed
    Commit message - This script was a one off hack for a special case. Now that ip
                     commands have better formatting, there is no real reason for it
   ifcfg has been removed
    Commit message - This script was from olden days of ifcfg. I don't see any
                     distribution using it and it is time to put it out to pasture.
- Changelog - There is no changelog. For details of changes you have to review the
              commits in the git repository
              https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/log/

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>