Documentation for gitolite version 2 has been removed from the site. I don't
mind answering the odd question from legacy users who have not yet switched
("if it ain't broke..."), but I have seen too many people reading the v2 pages
as if for the first time, or, worse, running v3 but looking at the v2 page,
Gitolite v3 was released in April 2012 (i.e., as of today, about 3.5 years ago) and it's high time you switched anyway.
Here are some useful links:
Finally, the "Gitolite all-in-one page" (http://gitolite.com/gitolite/gitolite.html) is often useful when you are trying to find something across the entire set of pages. Just use your browser's Ctrl-F on this!