Use `content_url()` rather than `WP_CONTENT_URL` for style and script enqueue functions, fixing insecure content warnings when using SSL theme-side. Props tonyrix. Fixes #2518. (trunk)

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5261 9866e705-20ec-0310-96e7-cbb4277adcfb
Fix `@since` PHPDoc for Drupal7 converter. Props netweb. Fixes #2521. (trunk)

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5264 9866e705-20ec-0310-96e7-cbb4277adcfb