Fix capitalization
Mention is_special_ipv6 in Changes
Add $NEXT token to Changes
Make NextRelease date format match existing entries
v0.15

    - If your installed version of Socket.pm provides an inet_pton subroutine
      we use that to do validation. This is about 5x faster for IPv4 addresses
      and 20 times faster for IPv6.
    - Various unroutable networks are now recognized as non-public
      addresses. Based on a patch by Greg Oschwald. (Bug#83081).
    - Added is_unroutable_ipv4 exported sub.
    - Added is_public_ipv6, is_private_ipv6, is_loopback_ipv6,
      is_multicast_ipv6, and is_special_ipv6 subroutines.
    - Fixed the is_linklocal_ipv6 method. It didn't recognize the full
      link-local range properly.
    - Fixed bug where '::' was not recognized as a valid IPv6 address. (Bug#81700)
    - Fixed bug where ipv6 related subroutines were not untainting their return value.