sql/londiste: restore fkeys to local tables only
sql/londiste: restore fkeys to local tables only

Fwd-port from 2.1-stable

tarvip/skytools,overdrive3000/skytools,overdrive3000/skytools,overdrive3000/skytools,markokr/skytools,tarvip/skytools,tarvip/skytools,markokr/skytools,markokr/skytools