* split off lookup.h and publish.h from core.h
* implement wide-area DNS-SD
* if multiple clients query the same records, only start the query packet sequence once
* implement recursive CNAME queries
* add support for resolving services without TXT or A/AAAA records
* enlarge resolving timeouts to 5s
* implement new browse/resolving events CACHE_EXHAUSTED/ALL_FOR_NOW
* add support for resolving services without name. (i.e. for normal SRV records)
git-svn-id: file:///home/lennart/svn/public/avahi/trunk@608
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