Update net/tinc to version 1.0.9. Pick up maintainership and set license.

Changes since version 1.0.7:

- Apply patch from Max Rijevski fixing a memory leak when closing connections.
  It also cleans up more when stopping tinc, helping tools like valgrind.
- Handle broadcast and multicast packets in router mode.
  Multicast packets are treated as broadcast packets.
- Update the manpage as well, and some whitespace to make its source more legible.
- Update documentation.
  - TCPOnly is not experimental.
  - Do not mention old Linux kernels and Ethertap anymore.
  - Document the DeviceType, PMTU and PMTUDiscovery options.
- Enable PMTU discovery by default.
- Update copyright information.
- Update Dutch translation.
- Make sure IPv6 sockets are IPv6 only.
- This will get rid of the "Can't bind to 0.0.0.0 port 655/tcp: Address already
  in use" message on Linux.
- Use TUNIFHEAD by default on FreeBSD to make sure IPv6 works.
- Treat virtual network device as tap if Mode = switch or hub.
  On OpenBSD, the link0 flag should still be set in tinc-up or by other means.
- Correct debug message.
- Prevent freeing a NULL pointer when a hostname is unresolvable.
- Do not try to send REQ_KEY or ANS_KEY requests to unreachable nodes.
- Fix reading configuration files that do not end with a newline.
- Make sure the prefixlength of subnets is sane.
- Handle SERVICE_CONTROL_INTERROGATE requests. Thanks to Carsten Ralle for noticing this.
- Don't free struct addrinfo too early. Spotted by Christian Cier-Zniewski.
- Update dutch translation.
- Make sure connection->name is never NULL.
- Apply patch from "dnk" making sockets non-blocking under Windows.
- Close the proper filedescriptor (if it exists).
- Apply patch from Scott Lamb fixing some memory and resource leaks.
- Apply patch from Scott Lamb preventing an infinite loop when sending SIGALRM.

(tonnerre)