* fhandler_socket.cc (fhandler_socket::send_internal): Just use wmem size if

the length exceeds it.
* net.cc (fdsock): Use 65535 as window size, just like the comment says or we
run into problems with DuplicateHandle.
* path.cc (patch_conv::check): Use set_path to set invalid filename.
* path.h (path_conv::path_conv): Ditto.

winsup/cygwin/path.h

@@ -168,7 +168,7 @@ class path_conv
   : fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path_flags (0),
     known_suffix (NULL), normalized_path (NULL), error (0), dev (in_dev)
   {
-    path = cstrdup (in_dev.native);
+    set_path (in_dev.native);
   }
 
   path_conv (int, const char *src, unsigned opt = PC_SYM_FOLLOW,