MFC r257985:
  Fix panic with RADIX_MPATH, when RTFREE_LOCKED() called for already
  unlocked route. Use in6_rtalloc() instead of in6_rtalloc1. This helps
  simplify the code and remove several now unused variables.

  PR:		156283
MFC r270661:
  Remove leading '/' from hardlink name when removing them from the
  regular file name. This fixes the problem, when bsdtar can not create
  hardlinks to extracted files.
MFC 270674:
Clarify that the -c argument clears the list of tracepoints specified by
-t (it does not clear all tracepoints).

Approved by:	re (gjb for 10)
MFC 270722:
Correct the destroy example.  The -n argument is not needed (and is not
valid).

Approved by:	re (gjb for 10)