Imports of swarmd command

PathSynopsis
expvarPackage expvar provides a standardized interface to public variables, such as operation counters in servers.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/Sirupsen/logrus
github.com/docker/engine-api/client
github.com/docker/swarmkit/agent
github.com/docker/swarmkit/agent/exec/container
github.com/docker/swarmkit/cli
github.com/docker/swarmkit/log
github.com/docker/swarmkit/version
github.com/spf13/cobraPackage cobra is a commander providing a simple interface to create powerful modern CLI interfaces.
golang.org/x/net/contextPackage context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.
netPackage net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets.
net/httpPackage http provides HTTP client and server implementations.
net/http/pprofPackage pprof serves via its HTTP server runtime profiling data in the format expected by the pprof visualization tool.
osPackage os provides a platform-independent interface to operating system functionality.
os/signalPackage signal implements access to incoming signals.