Add ability to set response wait time

Author: Leonardo José

src/HttpClient.h

@@ -384,6 +384,7 @@ class HttpClient : public Client
     // Stores the value of the current chunk length, if present
     int iChunkLength;
     uint32_t iHttpResponseTimeout;
+    uint32_t iHttpWaitForDataDelay;
     bool iConnectionClose;
     bool iSendDefaultRequestHeaders;
     String iHeaderLine;