Merge remote-tracking branch 'sami/2014wk49'

* sami/2014wk49:
  chfn: make command to obey login.defs CHFN_RESTRICT instructions
  chfn: remove set_changed_data() and add add_missing()
  chfn: rename prompt() to ask_new_field()
  chfn: move new and old finger structs to chfn control struct
  chfn: clean up parse_argv()
  chfn: add minimalistic struct chfn_control
  chfn: simplify parse_passwd() by using strsep()
  chfn: fix usage() regression
  chfn: use xasprintf() rather than bunch of strlen() and malloc() calls
  chfn: rewrite prompt() to use strutils
  chfn: remove function prototypes
  lslogins: use hardcoded paths from pathnames.h
  lslogins: add space to systemd journal header and message
  lslogins: reject unknown time format arguments
  lslogins: fix short options
  lslogins: tell why command failed
  lslogins: make journald last logs time stamps to honor --time-format
  lslogins: allow changing password changed and expiration time formats