hash: minor cleanups

[pspp] / ChangeLog

diff --git a/ChangeLog b/ChangeLog
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+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2009-06-17  Eric Blake  <ebb9@byu.net>
+
+       hash: minor cleanups
+       * lib/hash.h (hash_entry): Make opaque, by moving...
+       * lib/hash.c (hash_entry): ...here.
+       (hash_insert): Clarify restrictions on what can be inserted.
+       (hash_get_next): Clarify when it is safe to remove an element
+       during traversal.
+       (check_tuning): Skip verification when tuning is known safe.
+       (hash_initialize): Clarify restrictions on tuning.
+
 2009-06-17  Jim Meyering  <jim@meyering.net>
        and Eric Blake  <ebb9@byu.net>