Restored markdown file describing the certificates folder

certs/README.md

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+Certificates
+============
+
+This folder contains a sample certificate and key that you can use in Janus for everything that's related to security, most importantly DTLS-SRTP and, in case you need it (see the deployment instructions in the docs on why you may not), for HTTPS and/or secure WebSockets as well. Please beware that these certificates are just for testing: they're self signed and not certificated by any authority (and certainly not by us!).
+
+You can change the certificates to use in the ```janus.cfg``` settings. Should you want to generate some certificates yourself, refer to the instructions on how to do so that can be found pretty much everywhere.
+
+Please beware, though, that 512 bit certificates should be avoided, as explained in #251.
+
+# Feeling lazy?
+Just as an example and for the lazy (you'll probably find better samples around), here's how you can quickly create a certificate as needed by Janus:
+
+	openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:1024 -keyout privateKey.key -out certificate.crt
+
+Just follow the instructions. This will create a private key in ```privateKey.key``` and a certificate in ```certificate.crt```. To use them, update the configuration file ```janus.cfg``` accordingly, to have the ```cert_pem``` and ```cert_key``` in ```[certificates]``` point to the newly created files.