Merge pull request #15253 from seamuslee001/5.18

Add in 5.17.1 Release notes and migrate .tpl file for 5.17.1 to 5.18 to support upgrade

CRM/Upgrade/Incremental/sql/5.17.1.mysql.tpl

@@ -0,0 +1 @@
+{* file to handle db changes in 5.17.1 during upgrade *}

release-notes.md

@@ -15,6 +15,15 @@ Other resources for identifying changes are:
     * https://github.com/civicrm/civicrm-joomla
     * https://github.com/civicrm/civicrm-wordpress
 
+## CiviCRM 5.17.1
+
+Released September 9, 2019
+
+- **[Synopsis](release-notes/5.17.1.md#synopsis)**
+- **[Bugs resolved](release-notes/5.17.1.md#bugs)**
+- **[Credits](release-notes/5.17.1.md#credits)**
+- **[Feedback](release-notes/5.17.1.md#feedback)**
+
 ## CiviCRM 5.17.0
 
 Released September 4, 2019

release-notes/5.17.1.md

@@ -0,0 +1,39 @@
+# CiviCRM 5.17.1
+
+Released September 9, 2019
+
+- **[Synopsis](#synopsis)**
+- **[Bugs resolved](#bugs)**
+- **[Credits](#credits)**
+- **[Feedback](#feedback)**
+
+## <a name="synopsis"></a>Synopsis
+
+| *Does this version...?*                                         |         |
+|:--------------------------------------------------------------- |:-------:|
+| Fix security vulnerabilities?                                   |   no    |
+| Change the database schema?                                     |   no    |
+| Alter the API?                                                  |   no    |
+| Require attention to configuration options?                     |   no    |
+| **Fix problems installing or upgrading to a previous version?** | **yes** |
+| Introduce features?                                             |   no    |
+| **Fix bugs?**                                                   | **yes** |
+
+## <a name="bugs"></a>Bugs resolved
+
+- **CiviCampaign: Fix deletion of campaigns when popups are disabled ([dev/core#1233](https://lab.civicrm.org/dev/core/issues/1233): [#15233](https://github.com/civicrm/civicrm-core/pull/15233))**
+- **Upgrade: Fix adding of pptx to the list of safe file extensions ([dev/core#1190](https://lab.civicrm.org/dev/core/issues/1190): [#15239](https://github.com/civicrm/civicrm-core/pull/15239))**
+
+## <a name="credits"></a>Credits
+
+This release was developed by the following authors and reviewers:
+
+Wikimedia Foundation - Eileen McNaughton; iXiam - César Ramos; Dave D;
+CiviCRM - Tim Otten; Australian Greens - Seamus Lee
+
+## <a name="feedback"></a>Feedback
+
+These release notes are edited by Tim Otten and Andrew Hunt.  If you'd like to
+provide feedback on them, please login to https://chat.civicrm.org/civicrm and
+contact `@agh1`.
+