Imports of package systemd

PathSynopsis
errorsPackage errors implements functions to manipulate errors.
github.com/coreos/go-systemd/activationPackage activation implements primitives for systemd socket activation.
netPackage net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets.
osPackage os provides a platform-independent interface to operating system functionality.
strconvPackage strconv implements conversions to and from string representations of basic data types.