Juan 09/07/2019: for bug in management of XLSZWSM variable , add/use specific 2D TLSFIELD2D_ll pointer , & other minor correction

Soline Bielli : 01/03/2019: Sea salt update: the significant sea wave height now influences salt emission.
The sea salt is either set to a default value of 2meters or read in ECMWF Grib file (if the variable exists).
Now 5 modes are available (3 before) and the order in output is changed.
The large-scale sea wave height from ECMWF grib is 2D. HALO2 update of the ls variable in modeln is not yet adapted to 2D field (it is switch off in this version for this variable).

Philippe 21/01/2019: add LIO_ALLOW_NO_BACKUP and LIO_NO_WRITE to modd_io_ll to allow to disable writes (for bench purposes)

Philippe 13/12/2018: split mode_netcdf module into multiple modules + add new subroutines to check if a file has been closed correctly
This is done:
*to reduce circular dependencies problems
*to have cleaner code
*to compile faster
*to detect problems with not correctly closed netCDF files

15/5/2018 : (S. Riette) Add ZPABST to keep pressure constant during timestep + (J.Colin) Add VISCOSITY

Philippe 28/03/2018: replace TEMPORAL_DIST by DATETIME_DISTANCE and ADD_FORECAST_TO_DATE and SUBTRACT_TO_DATE by DATETIME_CORRECTDATE

Philippe 22/03/2018: IO: use CFORMAT field of TFILEDATA instead of relying on LIOCDF4, LLFIOUT and LLFIREAD
This prevents some problems when mixing LFI and netCDF files (ie in cdf2lfi)
+ cleaning use of modd_io_ll for LIOCDF4, LLFIOUT and LLFIREAD (and others)

+ use them

+ FMOPEN_ll/FMCLOSE_ll are now private
+ cleaning of comments

* use new file structure for CLUOUT and CLUOUT0 (->TLUOUT and TLUOUT0)
* use PRINT_MSG with NVERB_FATAL to replace (some) "callabortstop"
* set TFILE_OUTPUTLISTING  to select file for outputs of PRINT_MSG
* removed some unused code

* added OUTPUTLISTING CTYPE for files (IO_FILE_OPEN_ll and IO_FILE_ADD2LIST)
* added NLU variable in TFILEDATA datatype
* removed HFIPRI argument in IO_FILE_OPEN_ll, FMOPEN_ll, IO_FILE_CLOSE_ll
  and FMCLOS_ll subroutines
* removed FM_ERR subroutine
* KRESP return code is now optional for IO_FILE_OPEN_ll, FMOPEN_ll,
  IO_FILE_CLOSE_ll and FMCLOS_ll subroutines

* CINIFILE/CINIFILEPGD: default values now set in modd_lunitn
* CLUOUT and COUTFILE: initialised in modd_lunitn
* simplified some manipulations of CINIFILE

+ removed some LEN=LEN_HREC for unrelated variables

* removed CDADFILENAME field from TOUTBAK structure
* added TDADFILE field to TFILEDATA structure

Philippe 30/03/2017: IO: use file structure instead of filename in arguments + add fields in TFIELDLIST

+ use IO_WRITE_FIELD for several fields written in diachronic files

                         and PRINT_MSG
                         Some calls are not yet (fully) ported

* added fields of MODD_GR_FIELD_n to TFIELDLIST
* adapted MNHWRITE_ZS_DUMMY_n and WRITE_DUMMY_GR_FIELD_n subroutines