Fix e2fsck -fD corruption without dirindex on ext2 or small directories

that have entries that sort before '.'.  From upstream's Git repo.

Approved by: miwi@ (mentor)

sysutils/e2fsprogs/files/patch-53fbfb2

@@ -0,0 +1,36 @@
+commit 53fbfb2bc3490d0ff317666322dd077c08116e0c
+Author: Theodore Ts'o <tytso@mit.edu>
+Date:   Mon Feb 22 23:51:26 2010 -0500
+
+    e2fsck: Fix bug which can cause e2fsck -fD to corrupt non-indexed directories
+    
+    E2fsprogs 1.41.10 introduced a regression (in commit b71e018) where
+    e2fsck -fD can corrupt non-indexed directories when are exists one or
+    more file names which alphabetically sort before ".".  This can happen
+    with ext2 filesystems or for small directories (take less than a
+    block) which contain filenames that begin with a space or some other
+    punctuation mark.
+    
+    Fix this by making sure we never reorder the '.' or '..' entry in the
+    directory, since they must be first.
+    
+    Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
+
+diff --git a/e2fsck/rehash.c b/e2fsck/rehash.c
+index 780742e..ceb8543 100644
+--- a/e2fsck/rehash.c
++++ b/e2fsck/rehash.c
+@@ -763,7 +763,12 @@ retry_nohash:
+ 
+ 	/* Sort the list */
+ resort:
+-	qsort(fd.harray, fd.num_array, sizeof(struct hash_entry), hash_cmp);
++	if (fd.compress)
++		qsort(fd.harray+2, fd.num_array-2, sizeof(struct hash_entry),
++		      hash_cmp);
++	else
++		qsort(fd.harray, fd.num_array, sizeof(struct hash_entry),
++		      hash_cmp);
+ 
+ 	/*
+ 	 * Look for duplicates