"redirect-handler" in server logs, what does it mean?

[Sgt_Kickaxe]

66.249.74.52 [11/Dec/2012:06:23:49 -0700] "GET www.example.com/pagename HTTP/1.1" 200 5454 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 0 "redirect-handler" "/var/chroot/home/content/six-digits/html/index.php"

Why is there a "redirect-handler" in the log and why is the path not returned as a url? e.g. /var/chroot/... instead of http://www.example.com/, are either of these a cause for concern?

Just curious, I couldn't find much documentation about these two elements.