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

* 'PR/libblkid-vfs' of https://github.com/karelzak/util-linux-work:
  lib/sysfs: add VFS parameter to sysfs_devno_is_dm_*()
  lib/procfs: use VFS dispatch for read and close
  lib/path: add VFS support
  vfs: add FILE* stream support to the VFS abstraction layer
  vfs: move mode2flags() to include/vfs.h as ul_mode_to_flags()
  wipefs: use blkid_probe_open_device()
  libblkid: use blkid_probe_open_device() in evaluate and verify
  libblkid: add blkid_probe_open_device()
  libblkid: use VFS I/O operations in probe
  libblkid: add blkid_probe_set_vfs() for pluggable I/O
  include: add VFS I/O abstraction layer
  all-io: rename read_all/write_all to ul_read_all/ul_write_all