Remove another potential memory leak by freeing thread data on global destruction. Also fix two typos in comments.
Remove another potential memory leak by freeing thread data on global destruction.
Also fix two typos in comments.


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@16609 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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