DAL/Node: follow-up from "DAL/Node: fork amplificator before starting the crawler"

The following discussion from !14399 (merged) should be addressed:

• @rafoo_ started a discussion: (+3 comments)

  Do we need this to happen before the fork too?

That ^ is the minor point. The more important point is that the child process also initializes the crypto, even though that seems to be avoidable.