Merge branch '3.2'

* 3.2:
  Define a GitHub issue template to avoid support questions

Author: fabpot

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,13 @@
+| Q                | A
+| ---------------- | -----
+| Bug report?      | yes/no
+| Feature request? | yes/no
+| BC Break report? | yes/no
+| RFC?             | yes/no
+| Symfony version  | x.y.z
+
+<!--
+- Please fill in this template according to your issue.
+- For support request or how-tos, visit https://symfony.com/support
+- Otherwise, replace this comment by the description of your issue.
+-->