Big bug bashing for GRASS 6!

In order to prepare the upcoming GRASS GIS 6.4.3 release, a major bugtracker cleanup has been done for GRASS 6 over the past few days. More than open 370 trac tickets (back to GRASS 6.4.0) were revisited, updated or closed: the GRASS GIS bugsquashing team submitted over 140 code changes, and subsequently 88 tickets could be closed in these few days. The few remaining critical tickets are being worked on, leading to a new stable GRASS GIS 6.4.3 release to be expected soon.