fixes in openwrt script from the lwds-lite lab as well
as some cosmetic changes and updating other scripts to
use two double quotes instead of two single quotes for
empty zone ids.
[rt29843]
[ISC-Bugs #23045] Typos in client/scripts/openbsd
[ISC-Bugs #23565] In the client scripts add a zone id (interface id) if
the domain search address is link local.
[ISC-Bugs #1277] In some of the client scripts add code to handle the
case of the default router information being changed without the address
being changed.
gateway if the supplied subnet mask for an IPv4 address was a /32. This
allows the client to work in 'captive' network environments, where the
operator does not want clients to crosstalk directly. [ISC-Bugs #17200]
- Add -x option, which causes running dhclient processes to exist
gracefully *without* releasing leases [rt16741]
(Merging both at once because the first one depended on the second one)
