Change MAX_URI_LENGTH for HTTPRequest from 4 to 16kb - 4kb is too small for todays internet

Net/include/Poco/Net/HTTPRequest.h

@@ -159,7 +159,7 @@ private:
 	enum Limits
 	{
 		MAX_METHOD_LENGTH  = 32,
-		MAX_URI_LENGTH     = 4096,
+		MAX_URI_LENGTH     = 16384,
 		MAX_VERSION_LENGTH = 8
 	};