BLOG_AUTHOR should not be undefined.

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
do not default to the first provided values

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Make CONTENT_FOOTER_FORMATS work properly.

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>