web/config.ru incompatible with Phusion Passenger 4 due to redirection of stdout

[smsm1]

In upgrading Phusion Passenger to version 4.0.10 as part of a server move it turns out there's been a few changes that mean that stdout redirection causes issues for the application.

Commenting out the following line means that the app will now startup correctly:
https://github.com/joto/taginfo/blob/531a435ec4d0a93d88277eff6f5824a5eddbe103/web/config.ru#L14

Information about the problem is available at:
https://github.com/phusion/passenger/wiki/Debugging-application-startup-problems
https://code.google.com/p/phusion-passenger/issues/detail?can=2&q=&colspec=ID%20Type%20Status%20Priority%20Milestone%20Stars%20Summary&groupby=&sort=&id=914

[joto]

The redirect of stdout wasn't needed anyway as nothing should write to stdout. (Errors are written to stderr.)