Enable --warp by default

[arkpar]

No description provided.

[gavofyork]

does this interact well with --tracing &c.?

[arkpar]

--tracing, --fatdb, etc would start collecting data from the restoration point. I agree that this makes little sense. Fixed in the latest commit.

[gavofyork]

ok - one final thing: if the user states --warp while also configuring it (either through CLI or past options) tracing, fat db or archive then it should warn them that warp is disabled due to these.