FN_MHSUSER()
 Get MHS user list
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 Syntax
      FN_MhsUser() => aUser
 Arguments
     None
 Returns
     <aUser> Array of known local users at your MHS location
 Description
     Reading the MHS table file gives information on known MHS users
     at your local MHS host.

     If the MHS DOS variable USR is found, the mail id of the
     currectly logged user can be read by gete("USR").

     !!!Can be used to check input before sending a message to a local user
     using fn_MhsSndM().

 Examples
     fnMhsUser() => {"GSCOTT","CYELLICK","ADMIN","CBROWN"}


 Source: N:\SRC\MHS\MHS.PRG

 Author: Norbert Sommer