Add propper client initialization

  -add client states to avoid server sending data to uninitialized clients
  -don't show uninitialized clients to other players
  -propper client disconnect handling
Minor comment fixes in server
Minor bugfixes in connection
  -improved peer id calculation
  -honor NDEBUG flag
  -improved disconnect handling
  -increased initial send window
Remove some dead code

src/CMakeLists.txt

@@ -308,6 +308,7 @@ set(common_SRCS
 	connection.cpp
 	environment.cpp
 	server.cpp
+	clientiface.cpp
 	socket.cpp
 	mapblock.cpp
 	mapsector.cpp

src/client.cpp

@@ -383,13 +383,6 @@ void Client::step(float dtime)
 		// 0ms
 		ReceiveAll();
 	}
-
-	{
-		//TimeTaker timer("m_con_mutex + m_con.RunTimeouts()", m_device);
-		// 0ms
-		//JMutexAutoLock lock(m_con_mutex); //bulk comment-out
-		m_con.RunTimeouts(dtime);
-	}
 
 	/*
 		Packet counter
@@ -758,6 +751,7 @@ void Client::step(float dtime)
 	if (m_media_downloader && m_media_downloader->isStarted()) {
 		m_media_downloader->step(this);
 		if (m_media_downloader->isDone()) {
+			received_media();
 			delete m_media_downloader;
 			m_media_downloader = NULL;
 		}
@@ -1610,11 +1604,6 @@ void Client::ProcessData(u8 *data, u32 datasize, u16 sender_peer_id)
 		}
 
 		m_media_downloader->step(this);
-		if (m_media_downloader->isDone()) {
-			// might be done already if all media is in the cache
-			delete m_media_downloader;
-			m_media_downloader = NULL;
-		}
 	}
 	else if(command == TOCLIENT_MEDIA)
 	{
@@ -1666,11 +1655,6 @@ void Client::ProcessData(u8 *data, u32 datasize, u16 sender_peer_id)
 			m_media_downloader->conventionalTransferDone(
 					name, data, this);
 		}
-
-		if (m_media_downloader->isDone()) {
-			delete m_media_downloader;
-			m_media_downloader = NULL;
-		}
 	}
 	else if(command == TOCLIENT_TOOLDEF)
 	{