ogle/program/client: skip ssh if ogleproxy runs on localhost.

LGTM=r
R=r
https://golang.org/cl/81130043
diff --git a/program/client/client.go b/program/client/client.go
index c779774..1477677 100644
--- a/program/client/client.go
+++ b/program/client/client.go
@@ -35,7 +35,11 @@
 // It is similar to New except that the program is allowed to run.
 func Run(host string, textFile string, args ...string) (*Program, error) {
 	// TODO: add args.
-	cmd := exec.Command("/usr/bin/ssh", host, "ogleproxy", "-text", textFile)
+	cmdStrs := []string{"/usr/bin/ssh", host, "ogleproxy", "-text", textFile}
+	if host == "localhost" {
+		cmdStrs = cmdStrs[2:]
+	}
+	cmd := exec.Command(cmdStrs[0], cmdStrs[1:]...)
 	stdin, toStdin, err := os.Pipe()
 	if err != nil {
 		return nil, err