merge latest strongswan from Debian (Cosmic)

[Christian Ehrhardt ]

Latest Debian is mostly a maintenance change (compat level), never the less we could clean up some bugs on the merge and ensure none of the compat changes affects our current Delta.

With this merge I plan to look at:
- bug 1766240
- bug 1772705
- bug 1765652

Debian has not yet acccepted more of our Delta, so I pinged on https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=848890

[Christian Ehrhardt  (paelzer)]

Done - base Merge
Done - add planned bug fixes
Done - autopkgtests on Bileto https://bileto.ubuntu.com/excuses/3272/cosmic.html
InProgress - test with QA-Regression tests (two VMs doing tunnels)

[Christian Ehrhardt  (paelzer)]

Done - test with QA-Regression tests (two VMs doing tunnels)

[Christian Ehrhardt  (paelzer)]

Done - Test apparmor Denials that we expected to be fixed

[Christian Ehrhardt  (paelzer)]

MP up at https://code.launchpad.net/~paelzer/ubuntu/+source/strongswan/+git/strongswan/+merge/347026

[Launchpad Janitor (janitor)]

This bug was fixed in the package strongswan - 5.6.2-2ubuntu1

---------------
strongswan (5.6.2-2ubuntu1) cosmic; urgency=medium

  * Merge with Debian unstable, closes LP: #1773814 and LP: #1772705.
    Remaining changes:
    + Clean up d/strongswan-starter.postinst: section about runlevel changes
    + Clean up d/strongswan-starter.postinst: Removed entire section on
      opportunistic encryption disabling - this was never in strongSwan and
      won't be see upstream issue #2160.
    + d/rules: Removed patching ipsec.conf on build (not using the
      debconf-managed config.)
    + d/ipsec.secrets.proto: Removed ipsec.secrets.inc reference (was
      used for debconf-managed include of private key).
    + Mass enablement of extra plugins and features to allow a user to use
      strongswan for a variety of extra use cases without having to rebuild.
      - d/control: Add required additional build-deps
      - d/control: Mention addtionally enabled plugins
      - d/rules: Enable features at configure stage
      - d/libbstrongswan-extra-plugins.install: Add plugins (so, lib, conf)
      - d/libstrongswan.install: Add plugins (so, conf)
    + d/strongswan-starter.install: Install pool feature, which is useful since
      we have attr-sql plugin enabled as well using it.
    + Add plugin kernel-libipsec to allow the use of strongswan in containers
      via this userspace implementation (please do note that this is still
      considered experimental by upstream).
      - d/libcharon-extra-plugins.install: Add kernel-libipsec components
      - d/control: List kernel-libipsec plugin at extra plugins description
      - d/p/dont-load-kernel-libipsec-plugin-by-default.patch: As
        upstream recommends to not load kernel-libipsec by default.
    + Relocate tnc plugin
     - debian/libcharon-extra-plugins.install: Drop tnc from extra plugins
     - Add new subpackage for TNC in d/strongswan-tnc-* and d/control
    + d/libstrongswan.install: Reorder conf and .so alphabetically
    + d/libstrongswan.install: Add kernel-netlink configuration files
    + Complete the disabling of libfast; This was partially accepted in Debian,
        it is no more packaging medcli and medsrv, but still builds and
        mentions it.
      - d/rules: Add --disable-fast to avoid build time and dependencies
      - d/control: Remove medcli, medsrv from package description
    + d/control: Mention mgf1 plugin which is in libstrongswan now
    + Add now built (since 5.5.1) libraries libtpmtss and nttfft to
      libstrongswan-extra-plugins (no deps from default plugins).
    + d/control, d/libcharon-{extras,standard}-plugins.install: Move charon
      plugins for the most common use cases from extra-plugins into a new
      standard-plugins package. This will allow those use cases without pulling
      in too much more plugins (a bit like the tnc package). Recommend that
      package from strongswan-libcharon.
  * Dropped Changes (no more needed after 18.04)
    + Add rm_conffile for /etc/init.d/ipsec (transition from precies had
      missed that, droppable after 18.04)
    + d/control: bump breaks/replaces from libstrongswan-extra-plugins to
      libstrongswa...