docs: release notes for 2.5.17

Author: elliefm

Diff for: docsrc/imap/download/release-notes/2.5/x/2.5.17.rst

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+===============================
+Cyrus IMAP 2.5.17 Release Notes
+===============================
+
+.. IMPORTANT::
+
+    This is a bug-fix release in the `2.5 series <http://www.cyrusimap.org/2.5>`_.
+
+    Refer to the Cyrus IMAP 2.5.0 Release Notes for important information
+    about the 2.5 series, including upgrading instructions.
+
+Download via HTTPS:
+
+    * https://github.com/cyrusimap/cyrus-imapd/releases/download/cyrus-imapd-2.5.17/cyrus-imapd-2.5.17.tar.gz
+    * https://github.com/cyrusimap/cyrus-imapd/releases/download/cyrus-imapd-2.5.17/cyrus-imapd-2.5.17.tar.gz.sig
+
+.. _relnotes-2.5.17-changes:
+
+Changes Since 2.5.16
+====================
+
+Bug fixes
+---------
+
+* Fixed :issue:`3143`: tools/git-version.sh did not need bash specifically
+* Fixed :issue:`3191`: saved session reuse crash when TLS enabled for backend
+  connections
+* Fixed: XFER now recognises 3.4 and 3.5 backends
+* Fixed :issue:`3320`: memory leak during backend auth state cleanup
+* Fixed :issue:`3312`: fixed use-after-free segfault in mupdate-client (thanks
+  Mario Haustein)