r.stats.zonal parameter description

[pvanbosgeo]

In the manual page of r.stats.zonal, one has to give a base raster map and a cover raster map. From these terms alone it may not be clear which map should be what without going to the (linked) r.statistics manual page. I would like to suggest to:

1) copy the relevant parts to the description on the r.stats.zonal manual page.

2) describe the parameter base as "Name of base/zonal/category raster map". At minimum, use the word 'zonal' (it is part of the name of the function for a reason)

Point 2 applies to the description of the 'base' parameter of r.statistics as well.

[neteler]

In 69101:

r.statistics + r.stats.quantile + r.stats.zonal manual: extended (partial fix #3105)

[neteler]

Backported as well. Feel free to reopen (ideally with text suggestions) if not satisfied.