Merge r221285 from largeSMP project:

• Remove the following sysctl: kern.sched.ipiwakeup.onecpu kern.sched.ipiwakeup.htt2
  
  Because they are absolutely obsolete. Probabilly the whole wakeup forward mechanism should be revisited for a better fitting in modern hw, in the future.
• As map2 variable is no longer used rename map3 to map2
• Fix a string by making more informative the msg and removing the arguments passing.

Reviewed by: julian
Tested by: several