filelog: rename filelog.size() to filelog.len() filelog.size() is misleading for users of revlog.size() since it doesn't return the size of the revision.

#!/bin/sh

hg init
mkfifo p

hg serve --stdio < p &
P=$!
(echo lock; echo addchangegroup; sleep 5) > p &
Q=$!
sleep 3
kill -HUP $P
wait
ls .hg