Release: v2.8.4 #769

Job	Run time
Linux build test (gcc, g++, ON)	1m 6s
Linux build test (gcc, g++, OFF)	45s
Linux-amd64	3m 1s
Linux build test (clang, clang++, ON)	1m 1s
Linux-aarch64	10m 59s
Linux build test (clang, clang++, OFF)	1m 30s
FreeBSD-amd64	7m 23s
Linux build test (musl-gcc, musl-g++, OFF)	40s
Linux-old-amd64	3m 27s
macOS-universal	6m 43s
spellcheck	23s
Windows-amd64	2m 24s
Windows-i686	6m 25s
Release	0s
	45m 47s

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