Merge branch 'MNH-56-branch' into develop-56

src/LIB/MPIvide/mpivide.c

src/LIB/SURCOUCHE/src/mode_io_field_write.f90

src/MNH/diag.f90

src/MNH/end_diag_in_run.f90

src/MNH/ground_paramn.f90

src/MNH/ini_diag_in_run.f90

src/MNH/ini_prog_var.f90

src/MNH/ini_segn.f90

src/MNH/latlon_to_xy.f90

src/MNH/mnh2lpdm.f90

src/MNH/modd_diag_in_run.f90

src/MNH/mode_pos.f90

src/MNH/open_nestpgd_files.f90

src/MNH/open_prc_files.f90

src/MNH/prep_ideal_case.f90

src/MNH/prep_pgd.f90

src/MNH/prep_real_case.f90

src/MNH/read_desfmn.f90

src/MNH/read_exsegn.f90

src/MNH/read_exspa.f90