Do not always specify uv-file when it is the same as ssh-file.

Instead of reading command line arguments in procedure `input_ssh`,
read them outside and pass file names to `input_ssh`. This allows
`input_ssh` to be called by programs with different number of command
line arguments, in different positions. Preparing to make the
specification of uv-file optional.

Replace argument `s` of `set_all_extr` by its components. The idea is
to remove the structure `snapshot` from program `inst_edddies`.

We are circumventing a bug of the Intel Fortran compiler. This was
tested with both ifx `2023.1.0` and ifort `2021.9.0`. The bug occurs
on return from procedure `set_max_speed`: `free(): double free
detected in tcache 2` and crashes execution. The bug is revealed in
commit cc13fd5b. The GNU compiler does not have this bug.

To circumvent the Intel compiler bug, instead of an ssh component of
`cont_list_proj`, we have to use a separate array:
`cont_list_ssh`. This is maybe for the best because the component
`area` of `cont_list_proj` was not defined.

`MAX_RADIUS_deg` is not general enough for a non longitude latitude
grid. The variable `max_radius` moves from module `input_ssh_m` to
module `config_m`. The variable `MAX_RADIUS_deg` disappears. The
constraint `2 * max_radius_deg(1) < 180` becomes `4 * max_radius(1) <
nlon` but is only applied to the periodic case because we do not have
the general equivalent of 180° in number of points.

Promote nlon and nlat to variables of module `input_ssh_m`, avoiding
their repeated computation.

`Region_1_20454_cyclone_3/config_nml.txt` is a symlink to
`Extraction_eddies_region_1_noise/config_nml.txt`.

In main program units `inst_eddies`, `examine_eddy` and
`test_get_1_outerm`, redefine `outside_points` as coordinates in
projection space, avoiding a round trip to longitude and latitude. In
`examine_eddy`, we therefore store `coord_proj` instead of coord.

From `nearby_extr`.

Instead of `outside_points`.

Instead of `outside_points`.

Avoiding conversion back and forth to real.

Instead of corner.

Instead of corner.

Instead of corner.

Instead of from `out_cont`.

After reading `cont_list_proj`.

Pass `corner_proj` instead of corner to `mean_speed`, avoiding a
repeated computation.

Avoiding a repeated computation.

Pass `extr%coord_proj` instead of `extr%coord` to `get_1_outerm`,
avoiding a repeated computation of `extr%coord_proj`.

Call `input_ssh` from main program `test_mean_speed`. This is
necessary because procedure `mean_speed` uses variable corner from
module `input_ssh_m`. Note that we have to call config before
`input_ssh` since `input_ssh` uses a variable from module `config_m`.

Preparing for replacement by call to `input_ssh`.

Preparing for replacement by call to `input_ssh`.

See commit f5e0f59e.

In program `test_set_max_speed`, read `cont_list_proj` instead of
computing it. Computing it is not possible with a non
longitude-latitude grid.

Note that, as each shapefile should have an associated DBF file with
at least one field, we choose to put the SSH field in `cont_list_proj`
and the speed field in `cont_list`.