NEX-1643 dtrace provider for smbsrv
Also illumos 1841:
 DTrace smb provider was mis-implemented, doesn't exist.
Add back handlers for read/write raw, so that
 legacy dtrace consumers can find the probes.
Kill extra arg in smb_negotiate
Fix missing "done" probe with smb_notify
Add example consumer: smb-trace.d
fix soi_pid

*** 198,207 ****
--- 198,208 ----
  file path=usr/lib/dtrace/procfs.d mode=0444
  file path=usr/lib/dtrace/regs.d mode=0444
  file path=usr/lib/dtrace/sched.d mode=0444
  file path=usr/lib/dtrace/scsi.d mode=0444
  file path=usr/lib/dtrace/signal.d mode=0444
+ file path=usr/lib/dtrace/smb.d mode=0444
  file path=usr/lib/dtrace/srp.d mode=0444
  file path=usr/lib/dtrace/sysevent.d mode=0444
  file path=usr/lib/dtrace/tcp.d mode=0444
  file path=usr/lib/dtrace/udp.d mode=0444
  file path=usr/lib/dtrace/unistd.d mode=0444