testing an reseting drop-flag before drop.
refactor: better separation between control and relay.
allow setting which interface relay listens on.
log setsockopt errors.
this is not a fatal error
test pidfile in checkenv
more consistent with MArCd messages
workaround for cast-warnings

rrdtool library isn't const correct
using a common static lib
Merge branch 'sane_bind'
show CI count again

helps to track down errors, e.g. user error on MP with duplicated CI.
update noCI when MP connects
store ma mtu