10229 Some man pages have incorrect cross-references

*** 46,56 ****
  .Fa which .
  .Pp
  The signal constants, representing valid values for
  .Fa which ,
  can be found in
! .Xr signal.h 3HEAD.
  The signal
  .Dv SIGKILL
  may not be stopped.
  .Pp
  Note, only active processes may have their signal tracing flags updated.
--- 46,56 ----
  .Fa which .
  .Pp
  The signal constants, representing valid values for
  .Fa which ,
  can be found in
! .Xr signal.h 3HEAD .
  The signal
  .Dv SIGKILL
  may not be stopped.
  .Pp
  Note, only active processes may have their signal tracing flags updated.