INFORMATION_SCHEMA.INNODB_RSEG is not documented in 5.5 docs

The 5.5 docs say the following on the multiple rollback segments feature:

http://www.percona.com/doc/percona-server/5.5/scalability/innodb_extra_rseg.html:
"
In Percona Server 5.1, an improvement was provided for write-intensive workloads that allowed multiple rollback segments to be used. It has been removed from Percona Server 5.5.11-20.2 because an equivalent variable, innodb_rollback_segment, has been implemented in MySQL 5.5, and so the MySQL 5.5 implementation is available in Percona Server 5.5.
"

Which is correct, but it doesn't mention the INFORMATION_SCHEMA.INNODB_RSEG that Percona Server provides in addition to the upstream multiple rollback segment implementation.

So description of that table should be copied from the 5.1 version of the docs: http://www.percona.com/doc/percona-server/5.1/scalability/innodb_extra_rseg.html. Perhaps some reorganization is also necessary, because that page in 5.5 is now listed under the "Obsolete and Removed Features" section here: http://www.percona.com/doc/percona-server/5.5/