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

* 'port-osx' of https://github.com/rudimeier/util-linux:
  include: fix sys/sysinfo.h
  libblkid: don't include endian.h
  lib: fix ismounted includes for FreeBSD
  lib: remove unused variable
  lsns: use xcalloc()
  include: remove unused mntent.h
  include: check for sys/sysmacros.h
  lib: define LOGIN_NAME_MAX fallback
  include: provide MAP_ANONYMOUS on OSX
  lib: rename strmode() and setmode()
  tests: fix ts_option helpers
  build-sys: fix [g]libtoolize version for OSX
  build-sys: check linker support for version scripts
  build-sys: portable usage of find command
  travis: minor cleanup