All in the name of backward compat...

Otherwise we might run slicefix after a base image and before a delta
which could cause a train wreck in the FS if slicefix changes allocate
or deallocate blocks.

Also, grudgingly update some of the shell syntax to use constructs
introduced in the early 1990s. Sigh...this script will no longer run
on a PDP-11.

This is strictly for the benefit of the Emulab config where you can
request an image name by either ID or path, e.g. "testbed/FOO" or
"/proj/testbed/images/FOO.ndz". Previously, simultaneous requests
under both names would start up two different servers because we didn't
know they were the same image. Not really a problem for downloads,
but really not a good thing for uploads!

This prevents a line with a single "." from meaning EOF to sendmail.
How arcane!

I discovered this when I ran a create_image and I didn't get the complete
log mailed to me. This is because create_image did a frisbee download of an
image with a single chunk, which of course printed out:

  Using Multicast 235.252.1.187
  Joined the team after 0 sec. ID is 1586355915. File is 1 chunks (963200 bytes)
  .

Fortunately, "arcane" is my middle name, so it didn't take me long to find
this...

put the logfile when using the new -l option (on XEN).

Change the From: header to "Geni Operations".

experiment.

logged in users too.

deletes something they should not.

while creating a set ov new vnodes. Also some minor cleanup.