upstream release

- fix detection of systemd-resolved FS#59018
- improve unit file with restart=always and network.target FS#63321

- install to /usr/bin

- remove script from git (upstream accepted all changes)
- remove useless rm vpnc.conf in package()

- new "upstream" vpnc-script (fixes FS#26846)
- add mktarball convenience function to PKGBUILD

- use vpnc-script from david woodhouse:
  http://git.infradead.org/users/dwmw2/vpnc-scripts.git
  adds ipv6 support, and fixes a few bugs
- remove patch. this is covered by the script above.
- remove net-tools dependency. we survive on iproute2 now
- remove unreliable /etc/rc.d file -- vpnc has a timeout we can never be aware
  of, so it doesn't make sense to track it in the same way we track other
  daemons.

vpnc: Fix FS#25002 (add net-tools dep for now), FS#23452 (fix path, add optdepend) and FS#25095 (add supplied patch)