fixup! ioc: combine registrars and detect QSRV1 #436

Job	Run time
Linux centos 7	5m 29s
Linux fedora latest	7m 3s
Native Linux (WError)	8m 31s
Native Linux (libc++ debug)	7m 36s
Native Linux (c++17)	4m 56s
Cross mingw64 DLL	9m 55s
Cross mingw64 static	13m 8s
RTEMS5	16m 44s
Native Linux with clang	6m 48s
Native Linux with libevent stable	6m 0s
Native Linux with 7.0.2	7m 6s
Native Linux with 3.15	3m 47s
Native Linux with 3.14	4m 8s
OSX	7m 17s
vs2019 DLL	9m 41s
vs2019 static	10m 36s
	2h 8m 45s

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