Forward pingback IP during pingback verification.

Merges [27872] to the 3.8 branch.

props tellyworth, nacin.
fixes #27613.


git-svn-id: https://develop.svn.wordpress.org/branches/3.8@27873 602fd350-edb4-49c9-b593-d223f7449a82
Fix validation issue in get_the_password_form() caused by wpautop().

Merges [27134] to the 3.8 branch.

props andykeith.
fixes #27071.


git-svn-id: https://develop.svn.wordpress.org/branches/3.8@27874 602fd350-edb4-49c9-b593-d223f7449a82