SMACK-361 Added support for Entity Capabilities.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13558 b35dd754-fafc-0310-a699-88a17e54d16e
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