Fri, 06 Jul 2018 22:52:49 +0200 nipkow more symmetric
Fri, 06 Jul 2018 21:19:24 +0200 wenzelm prefer HTTPS;
Fri, 06 Jul 2018 16:29:47 +0200 wenzelm just one global lock for group status: avoid proliferation of mutexes, condvars;
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