var crypto/sha1.useSHANI

3 uses

	crypto/sha1 (current package)
		sha1block_amd64.go#L21: var useSHANI = cpu.X86.HasAVX && cpu.X86.HasSHA && cpu.X86.HasSSE41 && cpu.X86.HasSSSE3
		sha1block_amd64.go#L25: 	impl.Register("sha1", "SHA-NI", &useSHANI)
		sha1block_amd64.go#L29: 	if useSHANI {