is_valid_dabbel_user

	status.i4.v = is_valid_dabbel_user(user_name.ch.d)

	This routine checks to see if a user is a valid DABBEL user.

	user_name	 user name to check (USER_NAME_LEN characters)

	This function returns status values as follows:

	CLIB_NOTOPN		can't open DABBEL user file
	CLIB_MEMFAIL		dynamic memory allocation failure
	CLIB_BUGCHK		no valid DABBEL users were found
	TRUE			valid user name passed
	FALSE			invalid user name

	This function requires the following include files:

	cnsparam_h, ul_cbsaux_h:auxlib_misc_h, acnet_errors_h

	Related functions:

	user_validation_c

	C/C++ usage:

	static const char	user_name[] = "HENDRICKS";
	int	status;

	status = is_valid_dabbel_user(user_name);