Previously, the background rule implicitly overrode the
background-image to achieve the same effect.

Follows-up a4e2aaa and e535964.

Avoid overriding the dated upload dirs, since these are used on blogs.

Ref jquery/infrastructure-puppet#17.

Restore rendering of blog posts such as
https://blog.jquerymobile.com/2011/06/14/jquery-mobile-update-week-of-june-13/

which in older posts often use style attributes to float an image,
or create some ad-hoc design element.

Compare to
https://web.archive.org/web/20230602085906/https://blog.jquerymobile.com/2011/06/14/jquery-mobile-update-week-of-june-13/

Follows-up CSP work from last year at jquery/infrastructure-puppet#54,
although this is only an issue as of today, since I am
migrating blog.jquerymobile.com from the legacy blog theme to
jquery-wp-content.

It did not affect blog.jquery.com and blog.jqueryui.com, since those
haven't migrated yet.

Ref jquery/infrastructure-puppet#17

Follows-up d77ba33, which added comment styles for jquery.com,
but did not consider blog.jqueryui.com and jquerymobile.com.

Ref jquery/infrastructure-puppet#17.

Ref jquery/infrastructure-puppet#17.

Avatars of comments that were originally submitted as threaded/nested
comments are sized 39px instead of 68px. For a consistent layout,
render these at the same size as others.

https://blog.jquerymobile.com/2011/06/14/jquery-mobile-update-week-of-june-13/

Ref jquery/infrastructure-puppet#17.

Since a few weeks ago, Akismet is unconditionally adding a style
tag on every page of the site, for a widget that isn't even used.

Ref https://plugins.trac.wordpress.org/changeset/3232287/
Ref https://wordpress.org/support/topic/unused-styles-queues-on-every-page-since/
Ref jquery/infrastructure-puppet#17

Since a few weeks ago, Akismet is unconditionally adding a style
tag on every page of the site, for a widget that isn't even used.

Ref https://plugins.trac.wordpress.org/changeset/3232287/
Ref https://wordpress.org/support/topic/unused-styles-queues-on-every-page-since/
Ref jquery/infrastructure-puppet#17

The WordPress admin uses various inline scripts. This hasn't affected
us on doc sites so far, because we generally don't log into wp-admin
there. This affects blog.jquerymobile.com and soon other blogs.

Ref jquery/infrastructure-puppet#17

This has been misaligned this way for a long time (not a recent regression),
but seems easy to fix. Basically, the margin on `hentry` makes sense
in almost every context: single articles (there's a page title with
horizontal rule before it), and category/tag/search etc all have a
similar page title and horizontal rule.

The exception is the homepage where there is no explicit inline page
title, and instead the first element is the first article box, in which
case its margin is not separating it from anything else but from the
place where it should start.