MFC r291329: Remove redundant DPSRCS which were already in SRCS.
Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Fix the manual build.
Patches from Ruslam Ermilov to remove NetBSD bits from Makefiles and cleanupbuild problems with rescue.
create a new build heirarchy for ipfilter tools