libadns1-dev 1.4-0.1build1 (i386 binary) in ubuntu feisty

 adns is a resolver library for C (and C++) programs. In contrast with the
 existing interfaces, gethostbyname et al and libresolv, It can be used in
 an asynchronous, non-blocking, manner. Many queries can be handled
 simultaneously.
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 Development Version.