Revision 72

NaN to signalling NaN in gfortran_debug.mk.

Removed unused procedures in getincom and getincom2. In procedure
conf_interface, replaced call to getincom by new namelist. Moved
procedure conf_interface into module interface_surf.

Added variables sig1 and w01 to startphy.nc and restartphy.nc, for
procedure cv_driver. Renamed (ema_)?work1 and (ema_)?work2 to sig1 and
w01 in concvl and physiq.

Deleted unused arguments of clmain, clqh and intersurf_hq, among which
(y)?sollwdown. Following LMDZ, in physiq, read sollw instead of
sollwdown from startphy.nc, write sollw instead of sollwdown to
restartphy.nc.

In procedure sw, initialized zfs[ud][pn]a[di], for runs where ok_ade
and ok_aie are false. (Following LMDZ.)

Added dimension klev to startphy.nc and restartphy.nc, and deleted
dimension horizon_vertical. Made t_ancien and q_ancien two-dimensional
NetCDF variables. Bug fix: in phyetat0, define ratqs, clwcon and
rnebcon for vertical levels >=2.

Bug fix: set mfg, p[de]n_[ud] to 0. when iflag_con >= 3. (Following LMDZ.)