- Patch #16253 by Goba: this simple and straightforward patch adds the ability...

- Patch #16253 by Goba: this simple and straightforward patch adds the ability to define different types of markers (while retaining the old default behaviour of the new and required markers to look the same). Someone with enough time on his hands might be able to partition the new marker to a real new marker and a changed marker (since node_is_new() returns TRUE even if nodes changed, and not only when they are new). This is the base on which the new patch can be worked though.