- Don't use a variable to point to the user area that we only use once.   Just use p2->p_uarea directly instead. - Remove an old and mostly bogus assertion regarding p2->p_sigacts. - Use RANGEOF macro ala fork1() to clean up bzero/bcopy of p_stats.
- Don't use a variable to point to the user area that we only use once.
  Just use p2->p_uarea directly instead.
- Remove an old and mostly bogus assertion regarding p2->p_sigacts.
- Use RANGEOF macro ala fork1() to clean up bzero/bcopy of p_stats.

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