commit: Disable persistent dirstack for shells older then 4.2.0

[Frank Terbeck]

Changeset available online at:

http://hg.grml.org/grml-etc-core/rev/5bc1364cf82bd0b15e0014baecb9795ebad689e2


changeset:   392:5bc1364cf82bd0b15e0014baecb9795ebad689e2
tag:         tip
user:        Frank Terbeck <ft at grml.org>
date:        Wed Mar 26 11:06:50 2008 +0100
files:       etc/zsh/zshrc
description:
Disable persistent dirstack for shells older then 4.2.0

We use the (u) flag when saving, which is not available in these older
versions of zsh. We do not intent to keep this disabled forever; just
until we got a properly working solution for older shells.