Documented, and adnshost copes. Better reporting of unexpected or weird replies from nameserver. Many memory leaks fixed. Include and in adnshost.h. Regression tests can cope with zero-length reads.
Regression tests check for memory leaks.
Internal consistency checking with assert if right options set. Do not scramble innards when a query on the output queue is cancelled. Do not close tcp socket twice. Mailboxes containing spaces in their names are quoted. Reject TXT RRs with no strings.