Merge branch 'login-utils' of https://github.com/kerolasa/lelux-utiliteetit

* 'login-utils' of https://github.com/kerolasa/lelux-utiliteetit: (23 commits)
  last: fix few compiler warnings
  setpwnam: remove non-ANSI definitions [smatch scan]
  last: possible buffer overflow fixed [smatch scan]
  vipw: fix coding style
  setpwnam: fix coding style
  selinux_utils: fix coding style
  newgrp: fix coding style
  logindefs: fix coding style
  islocal: fix coding style
  chsh: fix coding style
  chfn: fix coding style
  chfn, setpwnam: let config.h be in control of extensions in use
  chfn, chsh: new file pamfail.h for error printing
  chsh: build bug: do not override config.h definition
  chfn, chsh, setpwnam: get true/false from stdbool.h
  login: add version printing option
  newgrp: add version and help options
  vipw: stop printing non-sense version string
  vipw: use libc error printing facilities
  chsh: use libc error printing facilities
  ...