by config(8):
- Make the vfs ops and vnodeop_opv symbols match the name of the
file-system option used to configure the file system into the kernel.
- Now that sys_mount() has mountcompatnames[], remove the holes previously
used to preserve ordering for COMPAT_09 and COMPAT_43 mount system calls.
Also, add a comment that describes how I feel about the existence of this
file.