network: use full 32-bits of transaction IDs

We used to use the first 16 bits for the message type.

src/utils.cpp

@@ -19,7 +19,6 @@
 #include "utils.h"
 #include "sockaddr.h"
 #include "default_types.h"
-#include "net.h"
 
 /* An IPv4 equivalent to IN6_IS_ADDR_UNSPECIFIED */
 #ifndef IN_IS_ADDR_UNSPECIFIED
@@ -161,18 +160,4 @@ findMapValue(msgpack::object& map, const std::string& key) {
     return nullptr;
 }
 
-namespace net {
-
-TransId
-unpackTid(msgpack::object& o) {
-    switch (o.type) {
-    case msgpack::type::POSITIVE_INTEGER:
-        return o.as<uint32_t>();
-    default:
-        return o.as<std::array<char, 4>>();
-    }
-}
-
-}
-
 }