Fixes TLS reconnection. #469

Job	Run time
B2 msvc-14.2	5m 50s
CMake msvc-14.2 Debug C++17	7m 38s
CMake gcc-11 17 Debug	8m 33s
B2 msvc-14.3	6m 30s
CMake msvc-14.2 Release C++17	8m 56s
B2 gcc-11	3m 31s
CMake gcc-11 20 Release	10m 42s
CMake msvc-14.3 Debug C++20	9m 36s
B2 clang-14	3m 22s
CMake clang-11 17 Debug	6m 2s
CMake msvc-14.3 Release C++20	9m 43s
CMake clang-11 20 Debug	6m 34s
CMake clang-13 17 Release	9m 0s
CMake clang-13 20 Release	9m 18s
CMake clang-14 17 Debug -stdlib=libc++	8m 28s
CMake clang-14 20 Release -stdlib=libc++	11m 16s
	2h 4m 59s

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