Merge branch 'PR/coverity' of https://github.com/karelzak/util-linux-work

Merge branch 'PR/coverity' of https://github.com/karelzak/util-linux-work

* 'PR/coverity' of https://github.com/karelzak/util-linux-work:
  hwclock: avoid dereferencing a pointer [coverity scan]
  lsfd: initialize struct stat [coverity scan]
  unshare: make strings more robust
  liblastlog2: (test) fix memory leak in failed test [coverity scan]
  libmount: remove possible leak in mnt_context_guess_srcpath_fstype() [coverity scan]
  test_sysinfo: remove memory lea [coverity scan]
  lslogins: remove possible memory leaks [coverity scan]