* include/ifaddrs.h: Define struct in6addrinfo.

* include/ifaddrs.h: Define struct in6addrinfo.

	Add two more parameters to __check_pf.
	* sysdeps/unix/sysv/linux/check_pf.c: When using the netlink
	interface, determine whether IPv6 addresses are deprecated or
	temporary.  Create array of those addresses.
	* inet/check_pf.c: Always tell caller there are no depracated
	and temporary addresses.
	* sysdeps/posix/getaddrinfo.c: Pretty printing.
	(struct sort_result): Add source_addr_flags field.
	(rfc3484_sort): Implement rule 3 and 7.
	(in6aicmp): New function.
	(getaddrinfo): Call __check_pf also when we need info about IPv6
	source addresses.  When creating array for sorting addresses,
	look up deprecated and temporary addresses returned by __check_pf
	and add flag if necessary.