Use an aHTTPS Agent and HTTPS scheme if RED.settings.https is set to …

…something

closes #1480

nodes/config/ui_base.js

@@ -1,3 +1,4 @@
+const { Agent } = require('https')
 const path = require('path')
 
 const axios = require('axios')
@@ -1130,7 +1131,17 @@ module.exports = function (RED) {
         const host = RED.settings.uiHost
         const port = RED.settings.uiPort
         const httpAdminRoot = RED.settings.httpAdminRoot
-        const url = 'http://' + (`${host}:${port}/${httpAdminRoot}flows`).replace('//', '/')
+        let scheme = 'http://'
+        let httpsAgent
+        if (RED.settings.https) {
+            const https = (typeof RED.settings.https === 'function' ? RED.settings.https() : RED.settings.https) || {}
+            httpsAgent = new Agent({
+                rejectUnauthorized: false,
+                ...https
+            })
+            scheme = 'https://'
+        }
+        const url = scheme + (`${host}:${port}/${httpAdminRoot}flows`).replace('//', '/')
         console.log('url', url)
         // get request body
         const dashboardId = req.params.dashboardId
@@ -1234,6 +1245,7 @@ module.exports = function (RED) {
             const getResponse = await axios.request({
                 method: 'GET',
                 headers: getHeaders,
+                httpsAgent,
                 url
             })
 
@@ -1314,6 +1326,7 @@ module.exports = function (RED) {
             const postResponse = await axios.request({
                 method: 'POST',
                 headers: postHeaders,
+                httpsAgent,
                 url,
                 data: {
                     flows,