Add basic IP range support to the normal Special:Contributions. No per-IP sorting or date headings, or any bells and whistles. Later we can move on to T145912 and create Special:RangeContributions for the power users.
This uses the table introduced with T156318, which has been given the OK from a DBA.
Currently we are only showing a block entry at the top if the full range is blocked, as opposed to subrange blocks or individual blocks of within the range.