Document change to how handle method of DIO works in the ChangeLog.
Document change to how handle method of DIO works in the ChangeLog.

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git-svn-id: 58c78e01c35a50cf7359cc800f5035f798b98bc3@265422 13f79535-47bb-0310-9956-ffa450edef68

tcl-mirror/rivet,tcl-mirror/rivet,tcl-mirror/rivet,tcl-mirror/rivet