fixes

[Francis Dupont]

I fixed a minor bug in the -L of dhccra (the flag did nothing) and
a major bug in setup4 for sdctld. BTW I checked sdctld on ida by
mapping ssh (tcp port 22) to the port 1222.
I patched sd-cpe2 bis but the sdctld package is not installed.
And of course I didn't check with a client because there is no visible
client...

Finished for today.

Francis Dupont <fdupont at isc.org>

PS: the trace of the PCP request:

ida:~> ~d/isc/rt28354/libpcp/map 149.20.74.65 0.0.0.0 22 1222 tcp 86400
epoch: 2879
internal port: 22
external address: 149.20.74.65
external port: 1222
lifetime: 86400

Note it doesn't work with another server address because the SNAT rule
applies and changes the source address for a PCP address mismatch.
I'd like to get a client to check it is particular to the SD-B4 itself.