Add utmp/wtmp support #1508

Job	Run time
cppcheck	1m 53s
code formatting check	37s
min features with gcc	2m 47s
min features with g++	3m 2s
min features with clang	2m 13s
max features with gcc	4m 0s
max features with g++	3m 20s
max features with clang	5m 29s
max features with gcc and DEBUG	2m 40s
max features with gcc for 32-bit arch (legacy OS)	2m 33s
max features with g++ for 32-bit arch (legacy OS)	2m 13s
max features with clang for 32-bit arch (legacy OS)	2m 19s
	33m 6s

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