isintlbld.cmd - Determines whether the current
       build environment is international (INTL).

  usage: isintlbld.cmd [Redmond|Dublin]

  If called with no parameters, it checks whether the current environment
  is an INTL build environment.
      If the environment is INTL, ERRORLEVEL is set to 0.
      Otherwise, ERRORLEVEL is set to 1.

  If called with Redmond or Dublin as a parameter, it checks whether the 
  current environment corresponds to an INTL build environment 
  from the given site (Redmond or Dublin).
      If the current site matches the given parameter, ERRORLEVEL is set to 0.
      Otherwise, ERRORLEVEL is set to 2.