Make the usecreatefast default 0 in tor to match the consensus

In #9386 (moved) we made clients use CREATE_FAST less, and changed the value in the consensus to 0. But we still use the default of 1 when bootstrapping (because there is no consensus).

We should change this default to 0.

Sticking this in 0.3.1 because it's a security hole for the reasons mentioned in #9386 (moved). (I'd go for 0.3.0, but that's frozen, and this change could introduce bootstrapping bugs.)

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