Milestone Avahi 0.6.17

This is a bugfix release.

• Don't accept "localhost" as a local mDNS host name
• Allow running avahi-bookmarks as CGI script
• Improve libdns_sd compatibility
• Stability: libdns_sd mutex locking order fix
• Publish IPv6 addresses via IPv4 and vice versa
• IA64 fixes
• A lot of minor cleanups and fixes

This release is backwards compatible with Avahi 0.6.x with x < 17.