Fixed Non-ASCII attachment filename will crash when downloading.

Thanks to xet7 !

Fixes #2759

packages/wekan-request/tests/ssl/ca/server.js

@@ -0,0 +1,28 @@
+var fs = require("fs")
+var https = require("https")
+var options = { key: fs.readFileSync("./server.key")
+              , cert: fs.readFileSync("./server.crt") }
+
+var server = https.createServer(options, function (req, res) {
+  res.writeHead(200)
+  res.end()
+  server.close()
+})
+server.listen(1337)
+
+var ca = fs.readFileSync("./ca.crt")
+var agent = new https.Agent({ host: "localhost", port: 1337, ca: ca })
+
+https.request({ host: "localhost"
+              , method: "HEAD"
+              , port: 1337
+              , headers: { host: "testing.request.mikealrogers.com" }
+              , agent: agent
+              , ca: [ ca ]
+              , path: "/" }, function (res) {
+  if (res.client.authorized) {
+    console.log("node test: OK")
+  } else {
+    throw new Error(res.client.authorizationError)
+  }
+}).end()