PHPDdoc corrections for topic and reply pending status approve and unapprove functions. See #2645

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5515 9866e705-20ec-0310-96e7-cbb4277adcfb
Include 'default' forum status and forum type meta keys in importers for databases that do not support these values.
* Forum status: `_bbp_status` = `open` meta
* Forum type: `_bbp_forum_type` = `forum`
Props netweb. See #2647

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5516 9866e705-20ec-0310-96e7-cbb4277adcfb
In bbPress 1.x converter add support for closed topics via improved method in r5425. 
Props netweb. Fixes #2125.

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5517 9866e705-20ec-0310-96e7-cbb4277adcfb