add lwIP TCP/IP stack as a runtime driver, native socket syscalls, SysGetMemoryStatus replacing CatchAllDebugBucket, fix timeGetTime to return milliseconds, fix SysSleep to interpret argument as milliseconds, SysGetTick now returns microseconds, harden all syscalls against bad user pointers with CopyFromUser/CopyToUser/MmProbeUser throughout, add networking test apps, port-forward 8080 in runa.bat, split LWIP_DRIVER_CFLAGS, add settings.ini to deploy, remove ethernet.c stub

code/kernel/syscall_nr.h

@@ -81,6 +81,20 @@
 #define SYS_GET_TICK                     72
 #define SYS_DEBUG_PRINT                  73
 #define SYS_QUERY_TRAP_FRAME             74
-#define SYS_CATCHALLDEBUGBUCKET          75
+#define SYS_SOCKET                       75
+#define SYS_BIND                         76
+#define SYS_LISTEN                       77
+#define SYS_ACCEPT                       78
+#define SYS_CONNECT                      79
+#define SYS_SEND                         80
+#define SYS_RECV                         81
+#define SYS_SHUTDOWN                     82
+#define SYS_SEND_TO                      83
+#define SYS_RECV_FROM                    84
+#define SYS_RESOLVE_HOST                 85
+#define SYS_SET_SOCKET_OPTION           86
+#define SYS_GET_SOCKET_OPTION           87
+#define SYS_POLL                        88
+#define SYS_GET_MEMORY_STATUS            89
 
-#define SYS_MAX                    76
+#define SYS_MAX                    90