Log Message:
Update thunderbird and thunderbird-gtk1 to 2.0.0.16.

Security fixes in this version:

MFSA 2008-34 Remote code execution by overflowing CSS reference counter
MFSA 2008-33 Crash and remote code execution in block reflow
MFSA 2008-31 Peer-trusted certs can use alt names to spoof
MFSA 2008-29 Faulty .properties file results in uninitialized memory being used
MFSA 2008-26 Buffer length checks in MIME processing
MFSA 2008-25 Arbitrary code execution in mozIJSSubScriptLoader.loadSubScript()
MFSA 2008-24 Chrome script loading from fastload file
MFSA 2008-21 Crashes with evidence of memory corruption

For more info, see http://www.mozilla.com/en-US/thunderbird/2.0.0.16/releasenotes/