Add configoption to exclude routes from tls upgrading (#2203)

* Add configoption to exclude routes from tls upgrading

* Add tests for IsLocationInLocationList

* Seperate elements in NoTLSRedirectLocations by comma

* Set NoTLSRedirectLocations to "/.well-known/acme-challenge/" by default

* Remove trailing slash from "/.well-known/acme-challenge" default

internal/ingress/controller/template/template.go

@@ -129,6 +129,7 @@ var (
 		"buildRateLimit":           buildRateLimit,
 		"buildResolvers":           buildResolvers,
 		"buildUpstreamName":        buildUpstreamName,
+		"isLocationInLocationList": isLocationInLocationList,
 		"isLocationAllowed":        isLocationAllowed,
 		"buildLogFormatUpstream":   buildLogFormatUpstream,
 		"buildDenyVariable":        buildDenyVariable,
@@ -513,6 +514,28 @@ func buildRateLimit(input interface{}) []string {
 	return limits
 }
 
+func isLocationInLocationList(location interface{}, rawLocationList string) bool {
+	loc, ok := location.(*ingress.Location)
+	if !ok {
+		glog.Errorf("expected an '*ingress.Location' type but %T was returned", location)
+		return false
+	}
+
+	locationList := strings.Split(rawLocationList, ",")
+
+	for _, locationListItem := range locationList {
+		locationListItem = strings.Trim(locationListItem, " ")
+		if locationListItem == "" {
+			continue
+		}
+		if strings.HasPrefix(loc.Path, locationListItem) {
+			return true
+		}
+	}
+
+	return false
+}
+
 func isLocationAllowed(input interface{}) bool {
 	loc, ok := input.(*ingress.Location)
 	if !ok {