Add a changes file for splitting structures out of or.h

diff --git a/changes/split_or_h b/changes/split_or_h
new file mode 100644 (file)
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+++ b/changes/split_or_h
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+  o Code simplification and refactoring:
+    - Many structures have been removed from the centralized "or.h" header,
+      and moved into their own headers.  This will allow us to reduce
+      the number of places in the code that rely on each structure's
+      contents and layout. Closes ticket 26383.