patch to mount(8) to support optional filesystem mounts

[Justin C. Sherrill]

Chris Pressey wrote:


> I know it's not critical stuff like asynch syscalls, but I feel I should
> be contributing *something* more to DragonFly than just academic design
> skirmishes on the kernel list... and shell scripts I can definately
> handle, and this'll be a good way to get a deeper appreciation of RCNG
> (which can only help re the optional mount enhancement.)

Don't forget documentation!  Otherwise, when we finnaly get docs together,
we'll "lose" a feature.