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

*** 92,101 ****
--- 92,102 ----
          procfs.d \
          regs.d \
          sched.d \
          signal.d \
          scsi.d \
+         smb.d \
          srp.d \
          sysevent.d \
          tcp.d \
          udp.d \
          unistd.d