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

@@ -248,10 +248,16 @@
         DTRACE_PROBE1(__smb_##name, type1, arg1);
 
 #define DTRACE_SMB_2(name, type1, arg1, type2, arg2) \
         DTRACE_PROBE2(__smb_##name, type1, arg1, type2, arg2);
 
+#define DTRACE_SMB2_1(name, type1, arg1) \
+        DTRACE_PROBE1(__smb2_##name, type1, arg1);
+
+#define DTRACE_SMB2_2(name, type1, arg1, type2, arg2) \
+        DTRACE_PROBE2(__smb2_##name, type1, arg1, type2, arg2);
+
 #define DTRACE_IP(name)                                         \
         DTRACE_PROBE(__ip_##name);
 
 #define DTRACE_IP1(name, type1, arg1)                                   \
         DTRACE_PROBE1(__ip_##name, type1, arg1);