Update README with version explanation

README.md

@@ -1,4 +1,28 @@
-luasec
+luasec-prosody
 ======
 
-LuaSec
+This is a (hopefully temporary) fork of LuaSec, an SSL and crypto library for Lua.
+
+LuaSec depends on OpenSSL, and integrates with LuaSocket to make it easy to add secure connections to any Lua applications or scripts.
+
+This version includes major new work undertaken by the Prosody community to expand LuaSec's capabilities, the changes are not yet available in an official LuaSec release. The additions include:
+
+  * A new certificate (X509) API, which supports:
+    
+    - Reading the subject (identity) and issuer of the certificate
+    - Reading various X509 extensions, including email and dnsName
+    - Converting certificates to and from the standard ASCII PEM format
+    - Generating the fingerprint/digest of a certificate (using SHA1, SHA256 or SHA512)
+    - Reading the certificate's expiration, serial number, and other info
+
+  * The ability to get more detailed information from OpenSSL about why a certificate failed verification, for each certificate in the chain
+  
+  * Flags to force acceptance of invalid certificates, e.g. to allow the use of self-signed certificates in a Trust On First Use model
+
+  * Flags to control checking CRLs for certificate revocation status
+  
+  * Support for ECDH cipher suites
+  
+  * An API to get the TLS 'finished' messages used for SASL channel binding (e.g. the SCRAM PLUS mechanisms)
+
+The work in this release was undertaken by Kim Alvefur, Paul Aurich, Tobias Markmann, Bruno Silvestre and Matthew Wild.