Revision 99

Created procedure test_disvert (following LMDZ). Added procedures
hybrid and funcd in module disvert_m. Upgraded compute_ab from
internal procedure of disvert to module procedure. Added variables y,
ya in module disvert_m. Upgraded s from local variable of procedure
disvert to module variable.

Renamed allowed value of variable vert_sampling in procedure disvert
from "read" to "read_hybrid". Added possibility to read pressure
values, value "read_pressure". Replaced vertical distribution for
value "param" by the distribution "strato_correct" from LMDZ (but kept
the value "param"). In case "tropo", replaced 1 by dsigmin (following
LMDZ). In case "strato", replaced 0.3 by dsigmin (following LMDZ).

Changed computation of bp in procedure compute_ab.

Removed debugindex case in clmain. Removed useless argument rlon of
procedure clmain. Removed useless variables ytaux, ytauy of procedure
clmain.

Removed intermediary variables tsol, qsol, tsolsrf, tslab in procedure
etat0.

Removed variable ok_veget:. coupling with the model Orchid is not
possible. Removed variable ocean: modeling an ocean slab is not
possible.

Removed useless variables tmp_rriv and tmp_rcoa from module
interface_surf.

Moved initialization of variables da, mp, phi in procedure physiq to
to inside the test iflag_con >= 3.