MFC r274737:

Use proper ordering in EXAMPLES section in growfs(8).

Sponsored by:	The FreeBSD Foundation
MFC r274738:

Document growfs(8) feature apparently nobody knows about.

Sponsored by:	The FreeBSD Foundation
MFC r274741:

Add example on how to use gpart before growfs.  While here, reorder examples
so that the simplest one comes first.

Sponsored by:	The FreeBSD Foundation
MFC r274742:

Uniformly refer to a file system as "file system".

Sponsored by:	The FreeBSD Foundation
MFC r274784:

Fix smbfs to not zero out statfs f_flags field. Previously, this
made getmntinfo() return empty flags for smbfs filesystems when
called with MNT_WAIT. It's not visible with mount(8), since it uses
MNT_NOWAIT, but broke autounmount(8) operation.

PR:		195161
Sponsored by:	The FreeBSD Foundation