Foxtrot is limited to only show 1000 pois

Foxtrot will only display 1000 pois at a time because there's a LIMIT in the sql statement in the get_pois() function in pois.c. I was able to remove this and recompile and it worked (slower, obviously).

This is obviously a sensible thing to do for lower-powered machines (displaying 5000 pois on my freerunner is SLOOOW!), but for higher-end machines like my desktop it's not brilliant.

I think it would be great if there was a config option to allow users to set this limit.