442 logging module restructuring. (#443) #953

Job	Run time
linux-gnu-shared-ext-log	1m 20s
linux-gnu-shared-ext-nolog	1m 11s
linux-gnu-static-all-test	2m 52s
linux-gnu-shared-all-test	2m 58s
linux-gnu-shared-noext-nolog	1m 10s
linux-clang-shared-ext-log	1m 41s
linux-clang-shared-ext-nolog	1m 37s
linux-clang-static-all-test	3m 36s
linux-clang-shared-all-test	3m 35s
linux-clang-shared-noext-nolog	1m 43s
win-cygwin-shared-ext-log	9m 23s
win-cygwin-shared-ext-nolog	8m 11s
win-cygwin-static-all-test	14m 39s
win-cygwin-shared-all-test	14m 27s
win-cygwin-shared-noext-nolog	8m 13s
win-clang-shared-ext-log	8m 27s
win-clang-shared-ext-nolog	8m 40s
win-clang-static-all-test	11m 13s
win-clang-shared-all-test	13m 46s
win-clang-shared-noext-nolog	11m 6s
win-msvc-shared-ext-log	6m 0s
win-msvc-shared-ext-nolog	5m 19s
win-msvc-static-all-test	7m 35s
win-msvc-shared-all-test	7m 29s
win-msvc-shared-noext-log	4m 35s
win-msvc-shared-noext-nolog	5m 31s
	2h 46m 17s

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