Add support for checking "server.ip" in addition to "client.ip".

Add support for checking "server.ip" in addition to "client.ip".

The definition of "server.ip" is what getsockname(2) returns
for our end of the connection.

Don't report ACL matches for acls created as a result of '==' or
'!=' usage on IP number variables.

Move storage for sess->sockaddr away from sessmem and expose
more code to <sys/socket.h>.  This is a network application
after all.

XXX: somebody with IPv6 connectivity needs to look at
ACLs in IPv6 context.

git-svn-id: svn+ssh://projects.linpro.no/svn/varnish/trunk@1390 d4fa192b-c00b-0410-8231-f00ffab90ce4