Make logview work

[price]

logview suffers from two problems that sharply limit its value to users:

• its dependence on grep makes it miss out many errors entirely;
• we don't have a good setup for getting logs from both servers.

The second problem is relatively easy to fix; #23 describes one approach that should be easy to implement and solve that problem.

The first is harder. Ideally Apache would put a request's logs someplace corresponding to the locker. Maybe this could be at suexec time. But, e.g., mod_rewrite errors, which are common causes of pulled-out user hair, happen before suexec time, so ideally we'd do something earlier.