Allows the users to add information to DECevent.

   Valid ADD commands are:

   ADD USER     ADD EXTERNAL

1  –  USER

   Adds a user name to one or all of the notification mailing lists.
   User names can be added to any of the mailing lists except the SICL
   mailing list which is reserved for Digital use only.

   ADD USER user-name [mail-list]

1.1  –  user-name

   Is the user name to be added to the specified mailing list.

1.2  –  mail-list

   Valid notification mailing lists for the ADD USER command are:

   - CUSTOMER
   - FSE
   - MONITOR
   - SICL

2  –  EXTERNAL

   Adds an entry to one external notification lists.

   ADD EXTERNAL entry_name list_name

2.1  –  entry_name

   On OpenVMS systems, is a logical name that points to a command procedure.
   On Digital Unix systems, is the name of a script file.

2.2  –  list_name

   Can be one of CUSTOMER or RESERVED.