dns.mitm: add GetAddrInfo redir, AtmosphereReloadHostsFile, debug logging control

libraries/libstratosphere/include/stratosphere/socket/socket_api.hpp

@@ -16,9 +16,13 @@
 #pragma once
 #include <vapours.hpp>
 #include <stratosphere/socket/socket_types.hpp>
+#include <stratosphere/socket/socket_errno.hpp>
 
 namespace ams::socket {
 
+    Errno GetLastError();
+    void SetLastError(Errno err);
+
     u32 InetHtonl(u32 host);
     u16 InetHtons(u16 host);
     u32 InetNtohl(u32 net);