zeroconf: guess ip for Zeroconf
Zeroconf() is actually pretty dumb in guessing IPs and in case of
socket.gaierror will not guess right IP.
#!/bin/sh
rm -rf a
hg init a
cd a
echo foo > foo
hg ci -qAm0
chmod +x foo
hg ci -m1
hg co -q 0
echo dirty > foo
sleep 1
hg up -q
cat foo
hg st -A
echo '% validate update of standalone execute bit change'
hg up -C 0
chmod -x foo
hg ci -m removeexec
hg up -C 0
hg up
hg st