Stop unconditionally marking bridges as having dir info.

When we implemented bridges, we added code in 08473872 to conditionally mark their directory info as present or not present. But the we didn't remove the old code to mark them present unconditionally!

Fixes #638 (closed).

assigned to @nickm

requested review from @ahf

mentioned in merge request !1409 (merged)

mentioned in issue #956

approved this merge request

Looks good

merged

mentioned in commit 63a3bbc3

mentioned in issue #673 (closed)

mentioned in issue #878