Comment # 3 on bug 1108009 from Ludwig Nussel

netconfig update -f kind of defeats the whole checksum dance doesn't it? But
yeah, I don't have other ideas either. Bug 1097370 is the future.

Not sure how to hook into the rollback procedure. I hope someone in the CC list
knows :-) For 15.0 we may even decide to not fix this but rather document it in
the release notes.