[minor] record proxy usage and location in agent environment

src/mig/agent.go

@@ -23,9 +23,11 @@ type Agent struct {
 }
 
 type AgentEnv struct {
-	Init  string `json:"init,omitempty"`
-	Ident string `json:"ident,omitempty"`
-	Arch  string `json:"arch,omitempty"`
+	Init      string `json:"init,omitempty"`
+	Ident     string `json:"ident,omitempty"`
+	Arch      string `json:"arch,omitempty"`
+	IsProxied bool   `json:"isproxied"`
+	Proxy     string `json:"proxy,omitempty"`
 }
 
 // findHostname retrieves the hostname of the node

src/mig/agent/context.go

@@ -399,6 +399,8 @@ func initMQ(orig_ctx Context, try_proxy bool, proxy string) (ctx Context, err er
 				err = fmt.Errorf("Invalid status received from proxy: '%s'", status[0:len(status)-2])
 				return
 			}
+			ctx.Agent.Env.IsProxied = true
+			ctx.Agent.Env.Proxy = proxy
 			return
 		}
 	} else {