add news item for ikiwiki 3.04

[ikiwiki] / doc / bugs / attachment_plugin_enabled_by_default__63__.mdwn

At [[attachment|plugins/attachment]] plugin page I can see
that it's enabled by default in Ikiwiki. Is it true?

> No, typo ([[done]]). I don't want to enable it by default because it requires
> site-specific configuration to be made secure. --[[Joey]]

>> Thanks for your reply! I was guessing it :) --[[Paweł|ptecza]]

I have backported Ikiwiki 2.52 and I need to add that plugin to
`add_plugins` variable in my `ikiwiki.setup` file (and rebuild
my wiki, of course) to see new upload buttons when I edit a page
and click "Attachments" link.

> FWIW, you don't need to rebuild the whole wiki, --refresh --wrappers is enough.

>> It's good to know. Thank you for the hint! 

Maybe should I enable attachment handling in different way?
--[[Paweł|users/ptecza]]