Point toward upstream asio issue tracker.

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,7 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Upstream repository located at https://github.com/chriskohlhoff/asio
+    url: https://github.com/chriskohlhoff/asio/issues
+    about: |
+           The source code in this repository is generated from upstream.
+           Please raise new issues there.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,3 @@
+The source code in this repository is generated from an upstream repository at https://github.com/chriskohlhoff/asio.
+
+Please consider raising new pull requests at https://github.com/chriskohlhoff/asio/pulls.

.github/move.yml

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+# Configuration for Move Issues - https://github.com/dessant/move-issues
+
+# Delete the command comment when it contains no other content
+deleteCommand: true
+
+# Close the source issue after moving
+closeSourceIssue: true
+
+# Lock the source issue after moving
+lockSourceIssue: true
+
+# Mention issue and comment authors
+mentionAuthors: true
+
+# Preserve mentions in the issue content
+keepContentMentions: false
+
+# Move labels that also exist on the target repository
+moveLabels: false
+
+# Set custom aliases for targets
+aliases:
+  upstream: chriskohlhoff/asio
+
+# Repository to extend settings from
+# _extends: repo