Vendor psutils and remove neko

plugins/system/ps/host/host.go

@@ -0,0 +1,37 @@
+package host
+
+import (
+	"encoding/json"
+)
+
+// A HostInfoStat describes the host status.
+// This is not in the psutil but it useful.
+type HostInfoStat struct {
+	Hostname             string `json:"hostname"`
+	Uptime               uint64 `json:"uptime"`
+	Procs                uint64 `json:"procs"`           // number of processes
+	OS                   string `json:"os"`              // ex: freebsd, linux
+	Platform             string `json:"platform"`        // ex: ubuntu, linuxmint
+	PlatformFamily       string `json:"platform_family"` // ex: debian, rhel
+	PlatformVersion      string `json:"platform_version"`
+	VirtualizationSystem string `json:"virtualization_system"`
+	VirtualizationRole   string `json:"virtualization_role"` // guest or host
+
+}
+
+type UserStat struct {
+	User     string `json:"user"`
+	Terminal string `json:"terminal"`
+	Host     string `json:"host"`
+	Started  int    `json:"started"`
+}
+
+func (h HostInfoStat) String() string {
+	s, _ := json.Marshal(h)
+	return string(s)
+}
+
+func (u UserStat) String() string {
+	s, _ := json.Marshal(u)
+	return string(s)
+}