This patch will allow the user to include the domain-search option in
replies from the built-in DHCP server. The domain suffixes can be
specified by adding dnssearch= entries to the "-net user" parameter.

[Jan: tiny style adjustments]
Signed-off-by: NKlaus Stengel <Klaus.Stengel@asamnet.de>
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>