06/30/89 - JR - DB_CNF.C
              - fixed bug in set_block_dpmask introduced when converting to
                masks in CODAS3\INCLUDE\DPMASK.H
                caused mask to be set incorrectly
                affected CODAS3\EDIT programs that set or check the mask--
                BADBIN.EXE, BOTMPAS3.EXE, ROTATE.EXE, LAST_85.EXE
              - changed arg of set_block_dpmask & set_db_dpmask to int bit position
                instead of ULONG mask in order to use DPMASK.H
              - added new function check_block_mask which returns > 0
                if arg bit position is already set in data proc. mask of current bloc
08/16/89 - JR - USE_DB.BAT
              - added IOSERV\ERRCHK.OBJ & IOSERV\OPTION.OBJ to library because
                DB_CNF requires set_long_bit() and OPTION requires check_error
12/19/89 - JR - TIME_IO.C
              - changed time scanning format from %d to %hd to work on 4-byte-word
                machines
         - JR - DB_CNF.C
              - check_blkprf()  \  changed block-profile index array declaration from
                set_db_dpmask() /  SHORT to int to work on 4-byte-word machines
01/02/89 - JR - POS_IO.C
              - automatically converts longitudes to range -180 to +179 upon
                retrieval from database
06-28-90 - JR - *.C:
                switched #includes to common.h in order to avoid
                problems when switching compilers
-------------------------------------------------------------------------------
90/08/15 - JR - check_db.c:
                added new function flag_data():  given a float array, the
                profile flags, and some mask, it sets each element in the
                array for which the profile flags coincide with the mask
                to BADFLOAT
91/02/12 - JR - range_io.c:
                new file with routines to support more flexible range I/O
91/09/18 - JR - range_io.c:
                expanded to include BLKPRF_RANGE type
              - nblkprf.c:
                added function BPCMP() for comparing BLKPRF_INDEX_TYPEs
93/02/02 - EF - time_io.c:
		added return value of 0 if something other than a time range
		is found for get_time_range().
96/09/21 - EF - dbdpmask.c:
      Removed some unnecessary checking from set_block_dpmask;
      should not cause any functional change.