If ssl_intermediate = is configured with a specific path and file does not exists, tor2web shall report an error and exit

[fpietrosanti]

If ssl_intermediate = is explicitly configured with a specific path and file does not exists, tor2web shall report an error to stdout and exit.

I was struggling to make a certificate chain to work, but i was referencing a non existing file from tor2web.conf with
ssl_intermediate = /home/tor2web/certs/tor2web-t2w.pem

--- Want to back this issue? **[Post a bounty on it!](https://www.bountysource.com/issues/28095855-if-ssl_intermediate-is-configured-with-a-specific-path-and-file-does-not-exists-tor2web-shall-report-an-error-and-exit?utm_campaign=plugin&utm_content=tracker%2F318575&utm_medium=issues&utm_source=github)** We accept bounties via [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F318575&utm_medium=issues&utm_source=github).