Add option to rewrite redirects

shared/management/proto/proxy_service.pb.go

@@ -399,6 +399,9 @@ type ProxyMapping struct {
 	// When true, the original Host header from the client request is passed
 	// through to the backend instead of being rewritten to the backend's address.
 	PassHostHeader bool `protobuf:"varint,8,opt,name=pass_host_header,json=passHostHeader,proto3" json:"pass_host_header,omitempty"`
+	// When true, Location headers in backend responses are rewritten to replace
+	// the backend address with the public-facing domain.
+	RewriteRedirects bool `protobuf:"varint,9,opt,name=rewrite_redirects,json=rewriteRedirects,proto3" json:"rewrite_redirects,omitempty"`
 }
 
 func (x *ProxyMapping) Reset() {
@@ -489,6 +492,13 @@ func (x *ProxyMapping) GetPassHostHeader() bool {
 	return false
 }
 
+func (x *ProxyMapping) GetRewriteRedirects() bool {
+	if x != nil {
+		return x.RewriteRedirects
+	}
+	return false
+}
+
 // SendAccessLogRequest consists of one or more AccessLogs from a Proxy.
 type SendAccessLogRequest struct {
 	state         protoimpl.MessageState