ws2_32: Fix SO_ACCEPTCONN on BSD systems.

dlls/ws2_32/socket.c

@@ -2855,7 +2855,6 @@ INT WINAPI WS_getsockopt(SOCKET s, INT level,
         {
         /* Handle common cases. The special cases are below, sorted
          * alphabetically */
-        case WS_SO_ACCEPTCONN:
         case WS_SO_BROADCAST:
         case WS_SO_DEBUG:
         case WS_SO_ERROR:
@@ -2875,7 +2874,20 @@ INT WINAPI WS_getsockopt(SOCKET s, INT level,
             }
             release_sock_fd( s, fd );
             return ret;
+        case WS_SO_ACCEPTCONN:
+            if ( (fd = get_sock_fd( s, 0, NULL )) == -1)
+                return SOCKET_ERROR;
+            if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, optval, (socklen_t *)optlen) != 0 )
+            {
+                SetLastError((errno == EBADF) ? WSAENOTSOCK : wsaErrno());
+                ret = SOCKET_ERROR;
+            }
+
+            /* BSD returns != 0 while Windows return exact == 1 */
+            if (*(int *)optval) *(int *)optval = 1;
 
+            release_sock_fd( s, fd );
+            return ret;
         case WS_SO_DONTLINGER:
         {
             struct linger lingval;