Merge two different descriptions of siteurl and home options. fixes #22771.

git-svn-id: http://core.svn.wordpress.org/trunk@23363 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Only show "There is a pending change of your e-mail..." message on the current user's profile page. fixes #23146.

git-svn-id: http://core.svn.wordpress.org/trunk@23364 1a063a9b-81f0-0310-95a4-ce76da25c4cd
PHPDoc fixes and additions. props bananastalktome, DrewAPicture. fixes #23313.

git-svn-id: http://core.svn.wordpress.org/trunk@23365 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Select "Attribute all posts to..." radio button automatically when selecting a username from the dropdown. fixes #23224.

git-svn-id: http://core.svn.wordpress.org/trunk@23366 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Properly check if the custom header/background has been initialized. fixes #23170. see #22246.

git-svn-id: http://core.svn.wordpress.org/trunk@23367 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Correct the documentation for balanceTags(). Remove unnecessary boolean inversion. props TobiasBg. fixes #22537.

git-svn-id: http://core.svn.wordpress.org/trunk@23368 1a063a9b-81f0-0310-95a4-ce76da25c4cd
New icons take one, props empireoflight, see #23333

git-svn-id: http://core.svn.wordpress.org/trunk@23369 1a063a9b-81f0-0310-95a4-ce76da25c4cd
New icons: make the .icon32 container larger to prevent clipping, see #23333

git-svn-id: http://core.svn.wordpress.org/trunk@23370 1a063a9b-81f0-0310-95a4-ce76da25c4cd
First pass as an export API
Allow WP_WXR_Export to be init without arguments

It assumes we want everything in this case.
Rename export() to export_using_writer_class()

export() was too generic and suggested many
people should use it.
Remove XML from writer's names

Writing XML isn't part of their core responsibilities,
so we don't need to clutter their names.
Filter out empty WHERE clauses

If any of the *_where() methods returns an empty
condition it breaks the SQL query, because we
add en extra AND for it.
Make the defaults array more readable

Split into multiple lines, since we will be
adding more to it.
Rename post_status to status

We don't need to match the post member var and
introduce extra specificity.
Filter by author
Move public methods on top and order them sanely

Place the most used ones on top.
Add start/end date filtering
Get rid if 'all' => true

It's superseded by creating the object without any
arguments.
Add attachment of custom post types

Otherwise, if we choose to query a CPT, they get
filtered.

See http://core.trac.wordpress.org/ticket/17379