Max Message changed from 4Mb to 800MB

This fixes the oversized transaction issue 
-Provide extended block chain support (BSD-Improvement Protocol -2)
- Smart contract field for data storage.

Author: joshafest

src/net.h

@@ -55,8 +55,8 @@ static const int FEELER_INTERVAL = 120;
 static const unsigned int MAX_INV_SZ = 50000;
 /** The maximum number of new addresses to accumulate before announcing. */
 static const unsigned int MAX_ADDR_TO_SEND = 1000;
-/** Maximum length of incoming protocol messages (no message over 4 MB is currently acceptable). */
-static const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH = 4 * 1000 * 1000;
+/** Maximum length of incoming protocol messages (no message over 800 MB is currently acceptable). */
+static const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH = 800 * 1000 * 1000;
 /** Maximum length of strSubVer in `version` message */
 static const unsigned int MAX_SUBVERSION_LENGTH = 256;
 /** Maximum number of automatic outgoing nodes */