Respect more restrictive blog_public settings when disabling crawling
|Reported by:||ryan||Owned by:||ryan|
 introduced a pre_option_blog_public that returns 0 when replytocom is set in GET. This works fine for core but could thwart some privacy plugins that use blog_public values other than 0 or 1. To accommodate plugins, blog_public should be overridden only when it is currently set to 1.