bridge_driver.c: Fix autoconf setting

Code altered so that it is consistent with the associated comment. The
'autoconf' variable is forced to zero.
Signed-off-by: NNeil Wilson <neil@brightbox.co.uk>

.mailmap

@@ -26,6 +26,7 @@
 <fsimonce@redhat.com> <federico.simoncelli@gmail.com>
 <marcandre.lureau@redhat.com> <marcandre.lureau@gmail.com>
 <supriyak@linux.vnet.ibm.com> <supriyak@in.ibm.com>
+<neil@aldur.co.uk> <neil@brightbox.co.uk>
 
 # Name consolidation:
 # Preferred author spelling <preferred email>

src/network/bridge_driver.c

@@ -1566,9 +1566,9 @@ networkSetIPv6Sysctls(virNetworkObjPtr network)
         goto cleanup;
     }
 
-    if (virFileWriteStr(field, "1", 0) < 0) {
+    if (virFileWriteStr(field, "0", 0) < 0) {
         virReportSystemError(errno,
-                             _("cannot enable %s"), field);
+                             _("cannot disable %s"), field);
         goto cleanup;
     }