[GRASS-dev] New URL for GRASS Programmer's manuals

[Markus Neteler]

The updated GRASS Programmer's manuals are online available here:

GRASS 6: http://grass.osgeo.org/programming6/

GRASS 7: http://grass.osgeo.org/programming7/

These manuals are updated weekly (Saturday).

Note: these subdirectories are excluded for the mirror sites to
not overload them (rsync exclude rule).