rm cmake from the release branch before it goes out broken.  Policy dictates that you never commit to release, you commit to trunk and merge to release.
Merge [57542] to release. Fixes #3601.
Merge [57954], [57955] to release.
Merge [58073], [58093] to release. Fixes #3003.
Merge documentation fixes.

* Use `doc/src/*.css` instead of `doc/html/*.css`.
* Remove wiki and people directories.
* Some documentation fixes.
* Left out `minimal.css` changes and boostbook changes because of clashes.
Merge [62251] to release. Fixes #4172.
Merge doc fix to release; fixes #4532
Merge [75391] to release. Fixes #5792.