[gridengine users] Characters in admin mail forcing contenttype octect-stream

[Dave Love]

I wrote:

> The problem is simply that the shepherd files appear
> to be empty, though I suspect they're not, at the time
> they're read. The rest of the mail is (now) OK.
> I'll debug it eventually...

I'd forgotten that the hostfile is one of the shepherd files and does
get printed.

To avoid confusion, here's a sample message from an 8.0.0a installation,
which behaves the same as a 6.2u5-ish one:

  Job 67 caused action: none
   User        = root
   Queue       = all.q at lv3fn.nw-grid.ac.uk
   Start Time  = <unknown>
   End Time    = <unknown>
  failed before writing exit_status:shepherd exited with exit status 19: before writing exit_status
  Shepherd trace:
  
  Shepherd pe_hostfile:
  lv3fn.nw-grid.ac.uk 1 all.q at lv3fn.nw-grid.ac.uk UNDEFINED