SMACK-225 Fixed DNS SRV handling, as per RFC 2782. Added support for multiple DNS SRV resolvers namely javax and org.xbill.dns (aka dnsjava).

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13559 b35dd754-fafc-0310-a699-88a17e54d16e

Conflicts:
	build/eclipse/classpath
	source/org/jivesoftware/smack/ConnectionConfiguration.java
	source/org/jivesoftware/smack/util/DNSUtil.java
Remove javax.naming which is not found on Android