in_list() compares values strictly as strings.

Prevents type juggling side-effects.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5330 2fea6a4d-a838-0410-917b-93a53c48e9d2
txp:if_author and txp:if_article_author check as strings.

Sweeping the codebase and removing any error-prone
conditionals.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5331 2fea6a4d-a838-0410-917b-93a53c48e9d2