- Remove garbage SIGSETOR() that snuck into struct sigpending_args   definition. - Use the proper constant for the last arg to kern_sigaction() in osigvec()   instead of a magic value.
- Remove garbage SIGSETOR() that snuck into struct sigpending_args
  definition.
- Use the proper constant for the last arg to kern_sigaction() in osigvec()
  instead of a magic value.

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