Expand the zxcvbn password meter blacklist, based on user input.

props iandunn.
see #25174.


git-svn-id: https://develop.svn.wordpress.org/trunk@25637 602fd350-edb4-49c9-b593-d223f7449a82
3.7-beta1


git-svn-id: https://develop.svn.wordpress.org/trunk@25638 602fd350-edb4-49c9-b593-d223f7449a82