ostree/pull: Add network-retries command line option

This exposes a way to specify from the command line the number
of times to retry each download after a network error. If a negative
value is given, then the default number of retries (5) is used. If 0
is given, then errors are returned without retrying.

closes #1659

Closes: #1669
Approved by: jlebon

man/ostree-pull.xml

@@ -129,6 +129,14 @@ Boston, MA 02111-1307, USA.
                     Traverse DEPTH parents (-1=infinite) (default: 0).
                 </para></listitem>
             </varlistentry>
+
+            <varlistentry>
+                <term><option>--network-retries</option>=N</term>
+
+                <listitem><para>
+                    Specifies how many times each download should be retried upon error (default: 5)
+                </para></listitem>
+            </varlistentry>
         </variablelist>
     </refsect1>