DOMcfg: careful review/cleaning needed after r13204

[mathiot]

Context

Work to have DOMcfg compatible with Agrif has been added in r13204. In the mean time:

• useless files came up with (MODEL.*, Makefile*, make.inc, sfmakedepend and maybe some other). This files are no more needed even with Agrif as a preprocessing step has been added last year. (cosmetic as long as you don't try to use it, I didn't test these files)
• in dom_oce : variable allocation removed last year as part of acleaning came up as commented fields. If they are useless they should be removed. (cosmetic)
• dom_clo has been commented and moved up (before dommsk). So even if uncommented, it will not work because ssmask is not known yet and why commented it ? If the option is not work, we should fix it not comment it. (functionality broken)
• others ? (I didn't do an extensive check of all the changes in the non-agrif part)

Analysis

It looks to me difficulties to merge a work baed on an old revision of the tools to the new version (commit r13024 in a branch) and then it propagate to the trunk of tools.

Suggestion

There is still work on-going with AGRIF, so it could be worth :

• waiting this to be done and then do a proper cleaning.
• adding a testing strategy for tools to avoid broken functionality for tools: especially REBUILD_NEMO and DOMAINcfg (need to test also reproducibility across various decomposition too).
• in the mean time maybe implement #2500 or part of it.

[mathiot]

In addition to the list mentioned above:

• possibility to write a mesh mask in addition to the domain_cfg.nc has been removed. Personally, I found it very useful if you need/want to preprocess file before running a simulation. Could it be reimplemented ?

These changes occurs at the same time as the changes mentioned above.