add XMPP support to README

README.textile

@@ -30,6 +30,7 @@ What do you get if you point this thing at a VPS? All kinds of good stuff!
 * "IMAP":https://en.wikipedia.org/wiki/Internet_Message_Access_Protocol over SSL via "Dovecot":http://dovecot.org/, complete with full text search provided by "Solr":https://lucene.apache.org/solr/.
 * "SMTP":https://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol over SSL via Postfix, including a nice set of "DNSBLs":https://en.wikipedia.org/wiki/DNSBL to discard spam before it ever hits your filters.
 * Webmail via "Roundcube":http://www.roundcube.net/.
+* Jabber/"XMPP":http://xmpp.org/ instant messaging via "Prosody":http://prosody.im/.
 * Virtual domains for your email, backed by "MySQL":https://www.mysql.com/.
 * Secure on-disk storage for email and more via "EncFS":http://www.arg0.net/encfs.
 * Spam fighting via "DSPAM":http://dspam.sourceforge.net/ and "Postgrey":http://postgrey.schweikert.ch/.