r8076: Put name resolution methods into libnet_context. This allows libnet based

application use methods of their own choice and makes it less dependent on
smb.conf parameters.
Use libnet_context in libnet_Lookup functions which is the way to pass
default name resolution methods if caller doesn't want to bother with
specifying them.

rafal

source/libnet/libnet.h

@@ -25,13 +25,16 @@ struct libnet_context {
 	 */
 	struct cli_credentials *cred;
 
-	/* dcerpc pipes */
-	struct dcerpc_pipe *samr;
+	/* pipe */
+	struct dcerpc_pipe *pipe;
 
 	/* opened handles */
 	struct policy_handle domain_handle;
 	struct policy_handle user_handle;
 
+	/* name resolution methods */
+	char **name_res_methods;
+
 	struct event_context *event_ctx;
 };