Preserve a format of RPC command definitions

Currently RPC commands are formatted in a way that it's easy to read
and that test/lint/check-rpc-mappings.py can parse it.

To void breaking test/lint/check-rpc-mappings.py script by running
clang-format, RPC command definitions should be disabled for clang-format.

src/rpc/net.cpp

@@ -624,6 +624,7 @@ static UniValue setnetworkactive(const JSONRPCRequest& request)
     return g_connman->GetNetworkActive();
 }
 
+// clang-format off
 static const CRPCCommand commands[] =
 { //  category              name                      actor (function)         argNames
   //  --------------------- ------------------------  -----------------------  ----------
@@ -640,6 +641,7 @@ static const CRPCCommand commands[] =
     { "network",            "clearbanned",            &clearbanned,            {} },
     { "network",            "setnetworkactive",       &setnetworkactive,       {"state"} },
 };
+// clang-format on
 
 void RegisterNetRPCCommands(CRPCTable &t)
 {