6/29/89 - J.R. - DBEXT.H
   Added casts to #define of MAX* and ADJ_BADFLOAT in DBEXT.H because of
   problems with Turbo-C v.2.0 compiler (performs comparisons of floats
   against the MINs incorrectly without the casts)
   Changed MAXDOUBLE from 1.7E38 to 1.0E38
   Changed >0 to >=0 in round macro because of problems with rounding 0.0
   to unsigned types
6/29/89 - J.R. - VSTAT.H & VECTOR.H
   added compiler-switchable non-prototype function declarations
   for SUN version
6/30/89 - J.R. - USE_DB.H
   added function check_block_dpmask in DB_CNF.C
   changed prototype for set_block_dpmask & set_db_dpmask
   see USE_DB\UPDATE.DOC for details
7/24/89 - J.R. - DBMISC.H
   added more compiler directives to work on Sun
9/19/89 - J.R. - MATFILE.H
   added new defines REAL_ROWS, REAL_COLS, IMAG_ROWS, IMAG_COLS (as well
   as ROW_WISE & COLUMN_WISE) for use with imagf parameter
   of savematx function so savematx can now write arrays in
   column-wise or row-wise orientation depending on the
   setting of this flag.
9/21/89 - J.R. - MATFILE.H
   added function declaration for tonan_f()
10/12/89 - J.R. - Transferred DPMASK.H to ADCP/INCLUDE subdirectory
12/17/89 - J.R. - MATFILE.H - put non-prototype declarations for SUN
                              added NaN definition for SUN
                              put #define MACHINE_TYPE here instead of
                              .C files
06/05/90 - JR - DBEXT.H
                Removed union in definition of STRUCT_DEF_HDR_TYPE
                (The initialization of unions at compile-time is too
                compiler-dependent.)
06/14/90 - JR - DATA_ID.H
                Added define data_id_included--needed to detect if
                data_id.h has been included prior to adcp.h, in which
                case the #define U & V causes problems during
                compilation--see adcp.h for fix
06/28/90 - JR - reorganized header files
                db.dcl & db.glo renamed as dbdcl.h & dbglo.h, resp.
                moved commonly used #include header files out from
                geninc.h to a new file called common.h--so routines
                that do not need file i/o stuff and dbext.h, dbdcl.h
                can easily be compiled using any compiler without
                checking all the common #includes for availability on
                that compiler.
06/29/30 - JR - OCEAN.H
                modified function declarations to match revised routines
                in ocean subdirectory
07/02/90 - JR - USE_DB.H
                fixed non-prototype decl. of dbclose_cnf()--should return
                void, not int.
07/03/90 - JR - MATFILE.H
                set MACHINE_TYPE based on HOST_ENV define in dbhost.h
                so there is no need to edit this file when moved across
                machines;
                added #define NaN for VAXD machine type
                NOTE:  Matlab does not correctly interpret a VAX NaN
                when VAX MAT-file is read on PC or Sun--comes out as
                some negative number to the power 37
07/05/90 - JR - OCEAN.H
                changed prototype for bvfreq() to use Pr[] instead of P[]
                so won't conflict with #define P in data_id.h
-------------------------------------------------------------------------------
90/07/12 - JR - dbinc.h
                changed declaration of db.temporary_data_file to
                char[L_tmpnam] to coincide with switch to tmpnam()
                for creating temporary file name during db creation.
90/07/13 - JR - common.h
                added #define VBUF for compilers that have setvbuf()
91/09/11 - JR - dbext.h:
                changed FILENAME_TYPE from 40 to 80 characters
93/02/22 - JR - matfile.h:
		added prototype for new function, transpose().
93/02/02 - EF - ioserv.h:
		added prototype for new function, skip_to()
94/08/08 - MZ - data_lst.h:
		added one more parameter: BEAM_STATS
95/09/07 - EF - misc.h:
      added prototype and declaration for stricmp().            
96/03/25 - EF - ioserv.h, dbext.h:
      changed NPATHMAX and sizeof(FILE_NAME_TYPE) from 80 to
      160.