Log Message:
Update do version 1.0.6 as requested by pkgsrc-security (hi!).

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STABLE RELEASE 1.0.6 : Major bug fixes

# Fix support for Teredo peers behind symmetric NATs (bug from 0.9.8).
  This could probably be used to spoof a Teredo clients.
# MacOS X compilation fix.

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STABLE RELEASE 1.0.5 : Major bug fixes

# Fix issues with timer and compiler optimizations (bug from 0.9.4).
# Increase ping test hop limit:
  Some IPv6 native nodes could not be reached otherwise.
# Increase HMAC secret size from 64 to 128 bits.
# Fix filtering of packets with link-local source address (bug from 0.4.0).
# Various fixes to the experimental ISATAP daemon.

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STABLE RELEASE 1.0.4 : Major bug fix

# Fix packet storm with Teredo client behind symmetric NATs.

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STABLE RELEASE 1.0.3 : Minor feature enhancement

# Work-around for compatibility with Microsoft Teredo servers.
# Better detection of symmetric NATs and access network changes.
# Limit spamming of syslog.

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STABLE RELEASE 1.0.2 : Minor portability and bug fixes

# Several portability and minor/impossible bug fixes (see ChangeLog).

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STABLE RELEASE 1.0.1 : Minor portability fixes

# Install configuration file samples into a dedicated directory.
# Build fixes (libteredo would not link on Mac OS X).