Documentation update
- make it clear that you have to have an existing repo to clone
- don't try to put the same key in different directories
- explain the .mercurial-server file.
if ${CHROOT_TEST_INSTALLDEB:-false} ; then
cp build/debian/*.deb $BACKING/action
else
hg st -mac0n -X '.hg*' -X 'dev/**' \
| cpio -p -0 -d $BACKING/action/mercurial-server
fi