tests/test-hup

add a new template function 'hgdate'

'hgdate' turns a date into a cset timestamp as printed by 'hg export'

#!/bin/sh

hg init
mkfifo p

hg serve --stdio < p &
P=$!
(echo lock; echo addchangegroup; sleep 5) > p &
Q=$!
sleep 1
kill -HUP $P
wait
ls .hg