dhcp-4.4.2.P1-160000.2.2

- Drop initscripts-legacy support [jsc#PED264]
- Drop rc<service> symlinks [jsc#PED-264], [jsc#PED-266]

- Use %patch -P N instead of deprecated %patchN.

- Revert dhclient-script removal and instead change usleep to sleep
  (boo#1216822)

- Add new Kea migration assistant subpackage
- Switch doc subpackage to noarch

- Remove dhclient-script (boo#1216822).

- Replace transitional %usrmerged macro with regular version check (boo#1206798)

- Add /etc/sysconfig/network hierachy to server file list

- Use %_rundir

- bsc#1203988, CVE-2022-2928, dhcp-CVE-2022-2928.patch:
  An option refcount overflow exists in dhcpd
- bsc#1203989, CVE-2022-2929, dhcp-CVE-2022-2929.patch:
  DHCP memory leak

- bsc#1198657: properly handle DHCRELAY(6)_OPTIONS.