api: epoll_ctl() to return ENOTSOCK when sock argument is not a socket

src/afd.c

@@ -116,7 +116,7 @@ static ssize_t _afd_get_protocol_info(SOCKET socket,
                  SO_PROTOCOL_INFOW,
                  (char*) protocol_info,
                  &opt_len) != 0)
-    return_error(-1);
+    return_handle_error(-1, socket);
 
   id = -1;
   for (size_t i = 0; i < array_count(AFD_PROVIDER_GUID_LIST); i++) {

src/error.c

@@ -95,7 +95,7 @@
   X(WSAENETUNREACH, ENETUNREACH)             \
   X(WSAENOBUFS, ENOMEM)                      \
   X(WSAENOTCONN, ENOTCONN)                   \
-  X(WSAENOTSOCK, EBADF)                      \
+  X(WSAENOTSOCK, ENOTSOCK)                   \
   X(WSAEOPNOTSUPP, EOPNOTSUPP)               \
   X(WSAESHUTDOWN, EPIPE)                     \
   X(WSAETIMEDOUT, ETIMEDOUT)                 \