build

doc: add get and set feature commands symbolic names #3161

Job	Run time
cross (armhf)	51s
cross (s390x)	48s
cross (ppc64le)	45s
muon minimal static	30s
default (gcc, release)	40s
default (gcc, debug)	25s
default (clang, debug)	26s
fallback shared libraries	1m 27s
default (clang, release)	38s
build libnvme and nvme-cli separately	39s
make static	40s
	7m 49s

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