#3 duplicate export entries

[Jerry Talkington]

When changing an export name to one that already
exists, a seperate export is still maintained. This
leads to errors when dealing with NetInfo.

I'm not sure how I'm going to fix this yet. I'm not
sure if mountd can handle dupes. If it can, I'll need
to add the NetInfo ID to the export (which would make
some things a whole lot easier.)

[Jerry Talkington]

Logged In: YES
user_id=715462

Mountd will accept multiple entries, as long as they do not
conflict. Options are cumulative between entries.