/usr/share/ is in strongswan-starter 5.6.2-1ubuntu2.
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..
/usr/share/doc/
/usr/share/doc/strongswan-starter/
/usr/share/doc/strongswan-starter/copyright
/usr/share/lintian/
/usr/share/lintian/overrides/
/usr/share/lintian/overrides/strongswan-starter
/usr/share/man/
/usr/share/man/man5/
/usr/share/man/man5/ipsec.conf.5.gz
/usr/share/man/man5/ipsec.secrets.5.gz
/usr/share/man/man8/
/usr/share/man/man8/ipsec.8.gz
/usr/share/strongswan/
/usr/share/strongswan/templates/
/usr/share/strongswan/templates/config/
/usr/share/strongswan/templates/config/plugins/
/usr/share/strongswan/templates/config/plugins/stroke.conf
/usr/share/strongswan/templates/config/strongswan.d/
/usr/share/strongswan/templates/config/strongswan.d/pool.conf
/usr/share/strongswan/templates/config/strongswan.d/starter.conf
/usr/share/doc/strongswan-starter/NEWS.Debian.gz
/usr/share/doc/strongswan-starter/changelog.Debian.gz