Motivation

Original description:

When the system reveals an IPv6 address, include an additional link to the /64. Adding a link would resolve one of my paper cuts with IP revealing, which is that it is very likely that a user is active on the /64 (per [[WP:/64]] and others) rather than the single IP and I want to verify not the specific IP but the activity on the /64 instead.
It is unfortunately common presently that users have multiple TAs even on the same /64 (and whether to use that information to associate potentially many addresses on a /64 as one TA has pluses/minuses that have discussion elsewhere, and I expect even in some future where the system does a better job correlating /64 addresses that it still won't get everything together under one TA).
I'd prefer to have two links here (the second can just display as /64 or some such) as opposed to > 1, because of aforementioned pluses/minuses (namely, residences get one /64... and libraries get one /64).

Acceptance criteria

Proposed mock:

• The /64 links to Special:IPContributions for the /64 range of the IPv6 address
• The link only appears once the user clicks "Show IP"