* Fix OpenGraph cards displayed for links to hablo-generated pages posted on the Fediverse (should work elsewhere too but I don't care and have never tested)
* This fix alas requires to «anchor» the generated website at a given location by means of the new `--site-url` option. OpenGraph cards are just completely disabled if you prefer your website to remain portable.
* Format for [conditional blocks](/Tissevert/hablo/wiki/Template-variables#metadata) changed to allow an internal simplification. This is transparent if you're creating a new blog or using the default wording but be sure to edit your wording if you're using a custom one :