Update man page of dunecontrol

It still mentions autogen and the AutoTools in a few places.

Mentioned in merge request !159 (merged)

Status changed to closed by commit f428dec5

Status changed to closed by merge request !159 (merged)

Mentioned in commit 89dabfa8

Mentioned in merge request !174 (merged)

Mentioned in commit b57f0f5b

Mentioned in commit f428dec5

mentioned in commit 199f930c