In `bbp_update_reply()`, send the reply `post_date` - rather than `current_time()` - into the update walker. Fixes possibility of inconsistent times between reply `post_date` and forum/topic last active times. Props netweb. See #1925.

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5221 9866e705-20ec-0310-96e7-cbb4277adcfb
In `bbp_update_topic()`, send the topic `post_date` - rather than `current_time()` - into the update walker. Fixes possibility of inconsistent times between topic `post_date` and forum last active times. Props netweb. See #1925.

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5222 9866e705-20ec-0310-96e7-cbb4277adcfb
In `bbp_update_topic_walker()` pass `$last_active_time` into `bbp_update_forum()` to avoid expensive recalculation of the forum's last active time. Props netweb. See #1925.

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5223 9866e705-20ec-0310-96e7-cbb4277adcfb