Please rename Special:IPBlockList to something that more appropriately describes its function. I think Special:ListBlocks or Special:BlockList would be good options.
This is a trivial commit, changing:
'Ipblocklist' => array( 'IPBlockList' ),
to:
'Ipblocklist' => array( 'ListBlocks', 'BlockList', 'IPBlockList' ),
in MessagesEn.php.
Version: unspecified
Severity: enhancement