NEX-9755 Race in libshare can cause zfs set sharenfs to fail
Reviewed by: Rick McNeal <rick.mcneal@nexenta.com>
Reviewed by: Gordon Ross <gordon.ross@nexenta.com>

@@ -83,10 +83,11 @@
         int     (*sa_command_help)();
         int     (*sa_delete_proto_section)(char *);
 };
 
 struct sa_proto_handle {
+        int                     sa_ref_count;
         int                     sa_num_proto;
         char                    **sa_proto;
         struct sa_plugin_ops    **sa_ops;
 };