podwrapper: virt-install is not a libguestfs page.

This now redirect to http://man.he.net/man1/virt-install, but this is
unfortunately a 404.

Incomplete fix for RHBZ#1029134.

Thanks: Paul Maunders.

podwrapper.pl.in

@@ -443,6 +443,7 @@ SUBHTML: {
         local $_ = shift;
 
         return 1 if /^Sys::Guestfs/;
+        return 0 if /^virt-install/;
         return 1 if /^virt-/;
         return 1 if /^libguestf/;
         return 1 if /^guestf/;