Secure paths that may contain sensitive information.

This includes SSL certs, checks, etc.  Leaving these world readable is a
serious security issue, since an exploit of any service on the system
will provide access to a great deal of privileged information.  The SSL
certs are obvious, but checks may include things like passwords for
other services.
Merge pull request #154 from pdf/secure_paths

Secure paths that may contain sensitive information.