set TCP_NODELAY #447

Job	Run time
Linux centos 7	4m 14s
Native Linux (WError)	5m 13s
Native Linux (libc++ debug)	7m 20s
Linux fedora latest	3m 45s
Native Linux (c++17)	6m 14s
Cross mingw64 DLL	6m 23s
Cross mingw64 static	8m 12s
RTEMS5	12m 39s
Native Linux with clang	5m 9s
Native Linux with libevent stable	4m 54s
Native Linux with 7.0.2	6m 31s
Native Linux with 3.15	4m 43s
Native Linux with 3.14	7m 49s
OSX	7m 52s
vs2019 DLL	6m 16s
vs2019 static	8m 33s
	1h 45m 47s

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