- Only define HAVE_UNIX_SOCKETS when we HAVE_STRUCT_SOCKADDR_UN, instead
  of listing OSs that don't have it.
  I also reverse the check for QNX, BEOS and WIN32.
  Not sure if it's still needed though.
- Define struct sockaddr_storage when it doesn't exist, and changed 
  SockAddr to use that.
- Also define a getnameinfo when getaddrinfo isn't found.
- Rewrote ClientAuthentication() ipv6 support to use getnameinfo().
- Rewrote parse_hba() ipv6 support to use getaddrinfo().
- parse_hba() now also support address/length (cidr) masks.
- Added ipv6 support in ident_inet().
- Fixed getaddrinfo_unix():
  - Check the right varible for the return value of calloc()
  - Make sure we free what we allocated in case of errors.
- Removed SockAddr_ntop(), SockAddr_pton() and convSockAddr6to4().
- Fixed mask in pg_hba.conf.sample.
- Added address/mask example.
- Allowed to listen to more than 1 inet socket.
- virtual_host now supports more than 1 address, seperated by a space.
- Used IS_AF_UNIX instead of isAF_INETx.
- Only try to listen to ipv6 when there is actually an ipv6 address set up.
- Only listen for ipv6 addresses on an AF_INET6 socket, if possible.
- Added ipv6 support in pgstat_init().
- Fixed getaddrinfo:
  - Return proper values for ai_socktype and ai_protocol
  - Work when there is no hints.
  - Fail if inet_aton() failed.
- BackendFork() now uses getnameinfo().
- connectFailureMessage() now uses getnameinfo().
- Removed all obsolete EAI_* constants.
- Make connectDBStart go thru all the addresses returned by getaddrinfo2()
  until it finds one that works.


- Only use TCP_NODELAY when it's defined.
- Fixed ident_inet() to be rfc compliant by sending \r\n instead of \n.

Removed (already commited):
- Rewrite getaddrinfo2() to always have the same parameters.
- Rewrite StreamServerPort() to use the new getaddrinfo2().
- Rewrite connectDBStart() to use the new getaddrinfo2().
- Fixed getaddrinfo:
  - bind to INADDR_ANY if no node is specified (AI_PASSIVE)
  - connect to INADDR_LOOPBACK if no node is specified (!AI_PASSIVE)