sources.list and indextargets option for pdiffs

Disabling pdiffs can be useful occasionally, like if you have a fast
local mirror where the download doesn't matter, but still want to use it
for non-local mirrors. Also, some users might prefer it to only use it
for very big indextargets like Contents.

1 files changed, 14 insertions, 0 deletions

diff --git a/doc/sources.list.5.xml b/doc/sources.list.5.xml
index 4eb3c0ba0..cfd98e545 100644
--- a/doc/sources.list.5.xml
+++ b/doc/sources.list.5.xml
@@ -226,6 +226,20 @@ deb-src [ option1=value1 option2=value2 ] uri suite [component1] [component2] [.
 		using the identifier as field name instead of using this
 		multivalue option.
 	  </para></listitem>
+
+	  <listitem><para><option>PDiffs</option> (<option>pdiffs</option>)
+		is a yes/no value which controls if APT should try to use PDiffs
+		to update old indexes instead of downloading the new indexes
+		entirely. The value of this option is ignored if the repository
+		doesn't announce the availability of PDiffs.  Defaults to the
+		value of the option with the same name for a specific index file
+		defined in the <option>Acquire::IndexTargets</option> scope,
+		which itself default to the value of configuration option
+		<option>Acquire::PDiffs</option> which defaults to
+		<literal>yes</literal>.
+	  </para></listitem>
+
+
        </itemizedlist>
 
        Further more, there are options which if set effect