- it was created. The default is "for ever" (0) if the Release file of the
- archive doesn't include a <literal>Valid-Until</literal> header.
- If it does then this date is the default. The date from the Release file or
- the date specified by the creation time of the Release file
- (<literal>Date</literal> header) plus the seconds specified with this
- options are used to check if the validation of a file has expired by using
- the earlier date of the two. Archive specific settings can be made by
- appending the label of the archive to the option name.
+ it was created (indicated by the <literal>Date</literal> header).
+ If the Release file itself includes a <literal>Valid-Until</literal> header
+ the earlier date of the two is used as the expiration date.
+ The default value is <literal>0</literal> which stands for "for ever valid".
+ Archive specific settings can be made by appending the label of the archive
+ to the option name.
+ </para></listitem>
+ </varlistentry>
+
+ <varlistentry><term><option>Min-ValidTime</option></term>
+ <listitem><para>Minimum of seconds the Release file should be considered
+ valid after it was created (indicated by the <literal>Date</literal> header).
+ Use this if you need to use a seldomly updated (local) mirror of a more
+ regular updated archive with a <literal>Valid-Until</literal> header
+ instead of completely disabling the expiration date checking.
+ Archive specific settings can and should be used by appending the label of
+ the archive to the option name.