In internal discussions re: IPv6 deployment for Wikimedia, we found that some of our large sites such as en.wikipedia.org have a recentchanges.rc_ip column that is not wide enough to hold IPv6 addresses.
Since CheckUser has long since taken over all other roles rc_ip used to hold for logging, if we can let CheckUser also handle this we'll be able to simply turn off $wgPutIPInRC and leave rc_ip entries empty without having to worry about it.
Will need backport to 1.17.
Version: unspecified
Severity: enhancement