During installation, the
/var/lib/dpkg/info/openswan.postinst post installation script fails to check whether a CA cert exists before trying to copy it.
This throws the mysterious error :
"cp: cannot stat `': No such file or directory"
Wrap the offending line (around line 176) with a quick check :
if [ "$cafile" ]; then
cp "$cafile" /etc/ipsec.d/cacerts