[GIT SERIES v2] secnet: IPv6 support

[Ian Jackson]

The following series is available for review here:
  http://www.chiark.greenend.org.uk/ucgi/~ian/git/secnet.git/
  git://git.chiark.greenend.org.uk/~ian/secnet.git
in the following rev-list:
  base.ipv6-3.v2..proposed.ipv6-3.v2

 29ec8ff  site: Support multiple addresses
 fbef1df  Provide dict_read_string_array
 edebfc8  resolver: Provide input name as argument to callback
 3961990  test-example: Switch to testing IPv6 too
 6edda96  Python IP addresses: Remove sys.path hacking from test script
 e6f93f9  Python IP addresses: Check for and maybe delete stale ipaddr.py
 3feb4a9  Python IP addresses: Use modern ipaddr.py - supports IPv6
 78c35cb  Python IP addresses: Provide ipaddrset.py library
 c152d48  resolver: Support IPv6 literals
 82aed9f  resolver: Log reason for DNS resolution failure
 65b1a0b  resolver: Support IPv6 name resolution
 bd34a53  udp: Support IPv6 when using authbind
 450494c  udp: Support IPv6 (mostly)
 6f22d50  udp.c: Remove some (ab)use of variable name `i'
 c6a3b1f  Provide text2iaddr.
 1bf7d7b  Provide ARRAY_SIZE
 a8a7df6  Make list_length and string_item_to_ipaddr const-correct.
 44db09d  udp: Break out udp_make_socket
 e6647c6  udp proxy: Properly zero holes in proxied address
 750c488  ipv6: Support printing, comparing, etc. IPv6 addresses
 99bac74  ipv6: check for support in system and in adns
 b85840f  autoconf: Update to autoconf 2.69
 fd32486  ipv6: More buffers in iaddr_to_string
 894134b  ipv6: introduce union iaddr
 57de5dc  site: Remove "wishful thinking" from transport address handling comment
 2e6d9cb  site: Permit multiple peer addresses even if peer is static
 ee22636  resolver: construct comm_addr; honour multiple addresses from the resolver
 c0f9855  site: transport peers: Update bulk of code for multiple addresses
 23b38ef  site: Make transport_record_peers cope with multiple addresses
 15efc8b  site: transport peers: Delete or demote unsuitable peers addresses
 3183f7f  comm_if: Define the meaning of ->sendmsg returning false
 ff8034f  site: transport peers: Notes on multi-address-family (IPv6) support
 4c550d0  site: transport peers: Formalise interface to transport peers
 df7e7ab  subnet_to_string: Do not allocate

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