Merge pull request rust-lang#653 from Urgau/triagebot-issue-links-no-mentions

Enable `[no-mentions]` and `[issue-links]` in `rustbot`

Author: antoyo

triagebot.toml

@@ -0,0 +1,7 @@
+# Documentation at https://forge.rust-lang.org/triagebot/index.html
+
+# Prevents un-canonicalized issue links (to avoid wrong issues being linked in r-l/rust)
+[issue-links]
+
+# Prevents mentions in commits to avoid users being spammed
+[no-mentions]