Release notes for 2.3.1

Change-Id: I8ff925a19e77cf5ad169b3661ec8b0ef0cd3a8a7
diff --git a/ReleaseNotes/ReleaseNotes-2.3.1.txt b/ReleaseNotes/ReleaseNotes-2.3.1.txt
new file mode 100644
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+Release notes for Gerrit 2.3.1
+Gerrit 2.3.1 is now available:
+There are no schema changes from 2.3.
+However, if upgrading from anything earlier, follow the upgrade
+procedure in the 2.3 link:ReleaseNotes-2.3.html[ReleaseNotes].
+Security Fixes
+* Some access control sections may be ignored
+Gerrit sometimes ignored an access control section in a project
+if the exact same section name appeared in All-Projects. The bug
+required an unrelated project to have access.inheritFrom set to
+All-Projects and be accessed before the project that has the same
+section name as All-Projects. This is an unlikely scenario for
+most servers, as Gerrit does not normally set inheritFrom equal to
+All-Projects. The usual behavior is to not supply this property in
+project.config, and permit the implicit inheritence to take place.
diff --git a/ReleaseNotes/index.txt b/ReleaseNotes/index.txt
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--- a/ReleaseNotes/index.txt
+++ b/ReleaseNotes/index.txt
@@ -5,6 +5,7 @@
 Version 2.3.x
 * link:ReleaseNotes-2.3.html[2.3]
+* link:ReleaseNotes-2.3.1.html[2.3.1]
 Version 2.2.x