Network fixes suggested by glebm

CMakeLists.txt

@@ -403,7 +403,6 @@ if(NOT NONET)
     Source/dvlnet/tcp_client.cpp
     Source/dvlnet/tcp_server.cpp
     Source/dvlnet/protocol_zt.cpp
-    Source/dvlnet/base_protocol.cpp
     Source/dvlnet/zerotier_native.cpp
     Source/dvlnet/zerotier_lwip.cpp)
 endif()

Source/dvlnet/base_protocol.cpp

@@ -1,8 +0,0 @@
-#include "dvlnet/base_protocol.h"
-
-#include <SDL.h>
-#include <algorithm>
-
-#ifdef USE_SDL1
-#include "utils/sdl2_to_1_2_backports.h"
-#endif

Source/dvlnet/base_protocol.h

@@ -190,6 +190,7 @@ void base_protocol<P>::recv()
 			for (plr_t i = 0; i < MAX_PLRS; ++i) {
 				if (peers[i] == sender) {
 					disconnect_net(i);
+					break;
 				}
 			}
 		}

Source/dvlnet/protocol_zt.h

@@ -39,6 +39,11 @@ public:
 			return addr == rhs.addr;
 		}
 
+		bool operator!=(const endpoint &rhs) const
+		{
+			return !(*this == rhs);
+		}
+
 		bool operator<(const endpoint &rhs) const
 		{
 			return addr < rhs.addr;