CHANGED:  DBGOTO() function
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     DBGOTO() has been modified to accept a parameter other than record
     number.

     DBGOTO(<xIdentity>) --> NIL

     <xIdentity> is a unique value guaranteed by the structure of the data
     file to reference a specific item in a data source (database).  In a
     (.dbf) <xIdentity> is the record number.  In other data formats,
     <xIdentity> is the unique primary key value.  <xIdentity> could be an
     array offset or virtual memory handle if the data set is in memory
     instead of on disk.