(size_t) and don't return EINVAL if it is < 0 in sys_{read,write}. Remove check for uio_resid < 0 uiomove() now that uio_resid is unsigned and brack remaining panics with #ifdef DIAGNOSTIC. vn_rdwr() must now take a size_t * as its 9th argument so change that and clean up uses of vn_rdwr(). Fixes 549 + more
part. Some ports can optimize the swap operations. This also means the
general API is extended with swap16, swap32, htobe16, htobe32, betoh16,
betoh32, htole16, htole32, letoh16 and letoh32.