Log to debug instead of warn

Author: bill-rich

proc_parent.go

@@ -393,11 +393,11 @@ func (mp *parent) fork() error {
 		//proxy exit code out to parent
 		code := 0
 		if err != nil {
-			mp.warnf("prog returned error: %s", err)
+			mp.debugf("prog returned error: %s", err)
 			code = 1
 			if exiterr, ok := err.(*exec.ExitError); ok {
 				if len(exiterr.Stderr) > 0 {
-					mp.warnf("prog stderr: %s", string(exiterr.Stderr))
+					mp.debugf("prog stderr: %s", string(exiterr.Stderr))
 				}
 				if status, ok := exiterr.Sys().(syscall.WaitStatus); ok {
 					code = status.ExitStatus()