Tor 0.4.5.6

The Tor 0.4.5.x release series is dedicated to the memory of Karsten
Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
Karsten is best known for creating the Tor metrics portal and leading
the metrics team, but he was involved in Tor from the early days. For
example, while he was still a student he invented and implemented the
v2 onion service directory design, and he also served as an ambassador
to the many German researchers working in the anonymity field. We
loved him and respected him for his patience, his consistency, and his
welcoming approach to growing our community.
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