fix the problem http request with '\0' and fixx query string in url

Fork of mbed-http by sandbox

Revision:
1:52947b0505de
Parent:
0:910f5949759f
--- a/mbed_lib.json	Thu Feb 16 11:35:56 2017 +0100
+++ b/mbed_lib.json	Thu Feb 16 11:47:08 2017 +0100
@@ -3,7 +3,7 @@
     "config": {
         "http-buffer-size": {
             "help": "Size of the HTTP receive buffer in bytes",
-            "value": 2048,
+            "value": 8192,
             "macro_name": "HTTP_RECEIVE_BUFFER_SIZE"
         }
     }