netother.cgi: show content of routing table 220

netother.cgi: show content of routing table 220

Since IPsec routing information do not show up in the normal routing
table, also displaying the contents of table 220 on netother.cgi might
be useful for debugging purposes.

The second version of this patch omits the output if routing table 220
is empty and introduces a custom translation for IPsec routing table
entries instead of just adding the table number to the generic translation.

Cc: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>