Changelog entry.

Signed-off-by: David Carlier <devnexen@gmail.com>
diff --git a/ChangeLog.d/getentropy.txt b/ChangeLog.d/getentropy.txt
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+Changes
+   * On recent enough versions of FreeBSD and DragonFlyBSD, the entropy module
+     now uses the getrandom syscall instead of reading from /dev/urandom.