+Berkeley DB 5.x
+---------------
+
+The 5.x versions seem to be current in several Linux disributions
+as of writing (2024). Exim uses them under the assumption that the
+API is the same as the version 4.1 library.
+
+Berkeley DB 6+
+---------------
+
+These versions exist, but documentation does not seem to be available.
+Exim does not support them.
+
+