Yep, got this from a list posted on the top one: http://beza1e1.tuxen.de/articles/accidentally_turing_complet...
You may find more interesting items such as:
Apache Rewrite Rules
Sendmail
BGP
and this (G/S ACE, through a translation error): http://forums.glitchcity.info/index.php/topic,6716.0.html