recrawl a single page explicit

[Jan Riewe]

Hi there,

till now i did not find a way to crawl a specific page manuell. 
Is there a possibility manuell set the recrawl interval or the crawl
date, or any other explicit way to make nutch invalidate a page?

We have got 70k+ pages in the index and a full recrawl would take to
long.

Thanks 
Jan