Merge branch 'port-osx' of https://github.com/rudimeier/util-linux

Merge branch 'port-osx' of https://github.com/rudimeier/util-linux

* 'port-osx' of https://github.com/rudimeier/util-linux:
  lib: include strutils.h for mempcpy()
  build-sys: remove duplicate cal sources
  lib: provide fallback if mkostemp(3) missing
  build-sys: chrt requires a sched_set* function
  build-sys: add --disable-ipcrm --disable-ipcs
  build-sys: disable login-utils if shadow.h or utmp.h is missing
  login-utils: minor utmp cleanup
  build-sys: build_init should check for flock
  newgrp: rename memset_s()
  misc: fix some includes
  libsmartcols: fix uninitialized variable
  fdisk: fix warning, incompatible pointer types passing 'uint64_t *'
  logger: use SCM_CREDENTIALS on LINUX only