Release 1.4.0a1 #791

Job	Run time
Linux centos 7	4m 17s
Linux fedora latest	4m 59s
Native Linux (WError)	5m 4s
Native Linux (libc++ debug)	5m 38s
Native Linux (c++17)	5m 16s
Cross mingw64 DLL	10m 46s
Cross mingw64 static	11m 29s
RTEMS5	14m 37s
Native Linux with clang	4m 28s
Native Linux with clang ubsan	5m 1s
Native Linux with libevent stable	4m 40s
Native Linux with 7.0.2	4m 59s
Native Linux with 3.15	4m 33s
Native Linux with 3.14	6m 30s
OSX	3m 6s
vs2019 DLL	9m 12s
vs2019 static	9m 10s
	1h 53m 45s

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