[GRASS5] G_command_history()

[Hamish]

If there are any modules you think should be updated to use
G_command_history() before 6.2.0, please mention them now.
(saves the command line into the map's meta-data history file)

In the future we can consider whether all modules that make a raster map
should use it, but for now as the priority I will only consider modules
like r.sun, r.patch, or v.surf.rst who have a number of input params
which are critical to record.

Please check that it hasn't already been done before suggesting... :)


Hamish