Description:
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The 'us4' mirror site does not seem to be redirecting requests to the appropriate manual page when going to "http://us4.php.net/FunctionName", though other servers are.

To reproduce this problem, visit any of the following pages:

http://us3.php.net/dirname (works)
http://us3.php.net/realpath (works)
http://us3.php.net/echo (works)

Now, visit the us4 mirror using the same requests:

http://us4.php.net/dirname (error page)
http://us4.php.net/realpath (error page)
http://us4.php.net/echo (error page)