Fixed a minor typo in the arcadepak's makefile related to DriveWire3 and Becker. Updated makefile with new option nightlytest. Run option is "make nightlytest". You also need to test environment variable TESTSSHDIR and TESTSSHSERVER before using it. Also updated the nightly option so if the SOURCEUSER environment variable is not set it will report it.

@BACKUP
Syntax: Backup [<opts>] [<srcdev>] [<destdev>]
Usage : Copies all data from one device to another
Opts  :
  e = exit if read error occurs
  f = backup from file
  s = single disk backup
  -v = do not verify writes