Pass feed_type arg in wp_list_authors() to get_author_feed_link().

Adds a slate of tests for wp_list_authors().

props MikeHansenMe.
fixes #26538.


git-svn-id: https://develop.svn.wordpress.org/trunk@27550 602fd350-edb4-49c9-b593-d223f7449a82
Avoid saving slashed data in XML-RPC's wp.setOptions.

props danielbachhuber.
fixes #22936.


git-svn-id: https://develop.svn.wordpress.org/trunk@27551 602fd350-edb4-49c9-b593-d223f7449a82