dash: some fixes for /bin/sh symlink.

1) Always create /bin/sh symlink at post-installation.
2) If dash is going to be removed, make /bin/sh a symlink
   to /bin/bash, if it exists otherwise it will be dangled.

This fixes the update of the dash package.

Bump revision.

--HG--
extra : convert_revision : 38586de9f72d0b5f4c7498dbef3709d77f4f07db

templates/dash/REMOVE

@@ -0,0 +1,15 @@
+#
+# This script remove the /bin/sh symlink to /bin/dash
+# and makes a new one to /bin/bash if available.
+#
+
+case "${ACTION}" in
+pre)
+	if [ -x ./bin/bash ]; then
+		echo "Creating /bin/sh -> /bin/bash symlink..."
+		cd ./bin && ln -sf bash sh
+	fi
+	;;
+post)
+	;;
+esac