Allow query strings for servers in IXR_Client and WP_HTTP_IXR_Client.

props cfinke.
fixes #26947.


git-svn-id: https://develop.svn.wordpress.org/trunk@27552 602fd350-edb4-49c9-b593-d223f7449a82
XML-RPC: Include 'sticky' in the struct returned from metaWeblog.getRecentPosts.

Using wp.getPosts is preferred and non-WP XML-RPC APIs are no longer actively maintained. This is simply for parity with existing MW methods.

props soulseekah.
fixes #26679.


git-svn-id: https://develop.svn.wordpress.org/trunk@27553 602fd350-edb4-49c9-b593-d223f7449a82
XML-RPC: In wp.editPost, Remove all terms in a taxonomy when an empty array is explicitly passed.

props jstraitiff, maxcutler.
fixes #26686.


git-svn-id: https://develop.svn.wordpress.org/trunk@27554 602fd350-edb4-49c9-b593-d223f7449a82