* Update dhcpcd to 5.6.8
* Update build to the latest standards

	deleted:    base/dhcpcd/dhcpcd-5.6.6-slackware.patch.xz
	renamed:    base/dhcpcd/dhcpcd-5.6.6-rundir.patch.xz -> base/dhcpcd/dhcpcd-5.6.8-rundir.patch.xz
	renamed:    base/dhcpcd/dhcpcd-5.6.6-slackwareservice.patch.xz -> base/dhcpcd/dhcpcd-5.6.8-slackwareservice.patch.xz
	modified:   base/dhcpcd/dhcpcd.build