I tested reelchannelscan on my vdr-1.7.15 and had problems with it. It crashs when using it with empty channels.conf, because it need a tuned channel before scanning. When started with an empty channels.conf there is no channel tuned and the plugin gets no valid initial channel data.
Do we have a fix for that issue?
Who does maintain an oficial (vdr) compatible version of the plugin?
imho - nobody
have a look on actuator plugin from Luca http://www.ventoso.org/luca/vdr/
it can scan dvb-s2 channels (see the discussion in vdr list about this plugin)