Sitemap: useless actions sitemap-additem and save-sitemap

[mvlcek]

I just wanted to enhance the I18N plugin to create correct sitemaps (with language in URL), but found out that the actions

• sitemap-additem
  
• save-sitemap
  

are useless, as the relevant variables are neither global nor passed to the action.
For 3.0 it would have been possible to add a admin menu item creating correct sitemaps but now with 3.1 and it's automatic generation of sitemaps this is not possible.

Edit: See also this topic regarding switching off sitemap generation/search engine pinging.