Only remove ONE piece of media from the content in setup_postdata().

props wonderboymusic. fixes #24052.

git-svn-id: http://core.svn.wordpress.org/trunk@23984 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Only say we accept a raw video/audio embed code for unfiltered_html users.

props wonderboymusic. see #23961

git-svn-id: http://core.svn.wordpress.org/trunk@23985 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Allow the content of no-title audio, video, quote, and image posts to be blanked.

props wonderboymusic. fixes #23623.

git-svn-id: http://core.svn.wordpress.org/trunk@23986 1a063a9b-81f0-0310-95a4-ce76da25c4cd