Change the flag used to start the server in the foreground from "-nodetach"
(with a single dash) to "--nodetach" (with two dashes).  It can also be used as
"-N" with a single dash.  This has the following benefits:

- It is more consistent with our other command-line arguments, and it is
  CLIP compliant.

- It makes it possible for the flag to appear anywhere in the argument list
  rather than just being the first argument.

- It makes it possible to provide this feature on Windows, whereas before it
  was only available on UNIX-based systems.

- On UNIX-based systems, "--nodetach" is now case-insensitive, although it is
  case-sensitive (all lowercase) on Windows systems.  The "-N" alternative is
  always case sensitive.

OpenDS Issue Number:  900