middleware/{log,errors}: output everything to stdout (#684)

Limit the options in both errors and log middleware, just output to
stdout and let someone else (journald,docker) care about where to route
the logs. This removes syslog and logging to a file.

Fixes #573 #602

middleware/errors/setup_test.go

@@ -13,18 +13,19 @@ func TestErrorsParse(t *testing.T) {
 		expectedErrorHandler errorHandler
 	}{
 		{`errors`, false, errorHandler{
+			LogFile: "stdout",
+		}},
+		{`errors stdout`, false, errorHandler{
+			LogFile: "stdout",
+		}},
+		{`errors errors.txt`, true, errorHandler{
 			LogFile: "",
 		}},
-		{`errors errors.txt`, false, errorHandler{
-			LogFile: "errors.txt",
-		}},
-		{`errors visible`, false, errorHandler{
+		{`errors visible`, true, errorHandler{
 			LogFile: "",
-			Debug:   true,
 		}},
-		{`errors { log visible }`, false, errorHandler{
-			LogFile: "",
-			Debug:   true,
+		{`errors { log visible }`, true, errorHandler{
+			LogFile: "stdout",
 		}},
 	}
 	for i, test := range tests {
@@ -40,9 +41,5 @@ func TestErrorsParse(t *testing.T) {
 			t.Errorf("Test %d expected LogFile to be %s, but got %s",
 				i, test.expectedErrorHandler.LogFile, actualErrorsRule.LogFile)
 		}
-		if actualErrorsRule.Debug != test.expectedErrorHandler.Debug {
-			t.Errorf("Test %d expected Debug to be %v, but got %v",
-				i, test.expectedErrorHandler.Debug, actualErrorsRule.Debug)
-		}
 	}
 }