Thu, 25 May 2017 18:13:16 +0200 wenzelm tuned;
Thu, 25 May 2017 18:07:29 +0200 wenzelm clarified message logging;
Thu, 25 May 2017 17:32:35 +0200 wenzelm more operations;
Thu, 25 May 2017 17:28:11 +0200 wenzelm clarified signature;
Thu, 25 May 2017 14:38:41 +0200 haftmann obsolete special case
Wed, 24 May 2017 16:35:18 +0200 wenzelm tuned message;
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