Re-add SSL checkboxes with name ssl_required

Summary:
Now that IMAP auth without SSL is enabled,
those checkboxes that weren't doing anything can come
back.

Test Plan:
This change isn't fully tested and should be thoroughly
inspected (on staging?) before rollout. The N1 end works and sends
parameters correctly, but a 401 prevented local testing of the
interface between N1 auth and sync-engine auth.

Reviewers: bengotow, drew

Reviewed By: drew

Subscribers: kav-ya

Maniphest Tasks: T6666

Differential Revision: https://phab.nylas.com/D2632

internal_packages/onboarding/lib/account-types.coffee

@@ -199,6 +199,13 @@ Providers = [
         default: 993
         format: 'integer'
         page: 1
+      }, {
+        name: 'ssl_required'
+        type: 'checkbox'
+        label: 'Require SSL'
+        className: 'half'
+        default: true
+        page: 1
       }, {
         name: 'imap_username'
         type: 'text'
@@ -230,6 +237,13 @@ Providers = [
         format: 'integer'
         default: 587
         page: 2
+      }, {
+        name: 'ssl_required'
+        type: 'checkbox'
+        label: 'Require SSL'
+        className: 'half'
+        default: true
+        page: 2
       }, {
         name: 'smtp_username'
         type: 'text'