commands: fix registrar check 'util' in hgsubversion is a different type from hgutil, which is the one from core hg. This was hidden by the fallback logic, but I'm not sure why it didn't cause errors in the tests. Maybe I ran the original tests against an older hg. This time I've ensured the tests pass against the latest version of hg.

#!/bin/sh
. $(dirname $0)/common.sh

for b in `hg branches -aq` ; do
    hg co $b || break
    echo verifying $b
    hg svn verify
done