book: Build darkfid RPC doc in a for loop.

doc/Makefile

@@ -4,13 +4,10 @@ DARKFID_JSONRPC = src/clients/darkfid_jsonrpc.md
 
 all:
 	echo "# darkfid JSON-RPC API" > $(DARKFID_JSONRPC)
-	./build_jsonrpc.py ../bin/darkfid2/src/main.rs >> $(DARKFID_JSONRPC)
-	echo "## blockchain methods" >> $(DARKFID_JSONRPC)
-	./build_jsonrpc.py ../bin/darkfid2/src/rpc_blockchain.rs >> $(DARKFID_JSONRPC)
-	echo "## wallet methods" >> $(DARKFID_JSONRPC)
-	./build_jsonrpc.py ../bin/darkfid2/src/rpc_wallet.rs >> $(DARKFID_JSONRPC)
-	echo "## miscellaneous methods" >> $(DARKFID_JSONRPC)
-	./build_jsonrpc.py ../bin/darkfid2/src/rpc_misc.rs >> $(DARKFID_JSONRPC)
+	for i in blockchain tx wallet misc; do \
+		echo "## $$i methods" >> $(DARKFID_JSONRPC);\
+		./build_jsonrpc.py ../bin/darkfid2/src/rpc_$$i.rs >> $(DARKFID_JSONRPC);\
+	done
 
 	echo "# cashierd JSON-RPC API" > src/clients/cashierd_jsonrpc.md
 	./build_jsonrpc.py ../bin/cashierd/src/main.rs \