hush: plug memory leak

diff --git a/shell/hush_leaktool.sh b/shell/hush_leaktool.sh
new file mode 100644
index 0000000..54a19aa
--- /dev/null
+++ b/shell/hush_leaktool.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# hush's stderr with leak debug enabled
+output=output
+
+freelist=`grep 'free 0x' "$output" | cut -d' ' -f2 | sort | uniq | xargs`
+
+grep -v free "$output" >temp1
+for freed in $freelist; do
+    echo Dropping $freed
+    cat temp1 | grep -v $freed >temp2
+    mv temp2 temp1
+done