prosody-modules: mod_tls_policy/README.markdown comparison

mod_tls_policy: Add README

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-:0a7053d14b43
+:98ad01cc83cf
+% Cipher policy enforcement with application level error reporting
+# Introduction
+This module arose from discussions at the XMPP Summit about enforcing
+better ciphers in TLS.  It may seem attractive to disallow some
+insecure ciphers or require forward secrecy, but doing this at the TLS
+level would the user with an unhelpful "Encryption failed" message.
+This module does this enforcing at the application level, allowing
+better error messages.
+# Configuration
+First, download and add the module to `module_enabled`.  Then you can
+decide on what policy you want to have.
+Requiring ciphers with forward secrecy is the most simple to set up.
+``` lua
+tls_policy = "FS" -- allow only ciphers that enable forward secrecy
+```
+A more complicated example:
+``` lua
+tls_policy = {
+c2s = {
+encryption = "AES"; -- Require AES (or AESGCM) encryption
+protocol = "TLSv1.2"; -- and TLSv1.2
+bits = 128; -- and at least 128 bits (FIXME: remember what this meant)
+}
+s2s = {
+cipher = "AESGCM"; -- Require AESGCM ciphers
+protocol = "TLSv1.[12]"; -- and TLSv1.1 or 1.2
+authentication = "RSA"; -- with RSA authentication
+};
+}
+```
+# Compatibility
+Requires LuaSec 0.5

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