Better error messaging on install.php. props DrewAPicture, ocean90. fixes #24982.


git-svn-id: https://develop.svn.wordpress.org/trunk@25620 602fd350-edb4-49c9-b593-d223f7449a82
Live network counts of users and sites for small networks.

props adamsilverstein, jeremyfelt.
fixes #22917.


git-svn-id: https://develop.svn.wordpress.org/trunk@25621 602fd350-edb4-49c9-b593-d223f7449a82