DB instruction edits - clarified MySQL notes, some other edits for wording.
DB instruction edits - clarified MySQL notes, some other edits for wording.

git-svn-id: 45dd6d84b2c35a302ede54b7837f3a336f0798e1@11749 66ffb92e-73f9-0310-93c1-f5514f145a0a

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