This reverts commit 72c5f4aa.

This reverts commit ad711d39.

This reverts commit 8be68269.

This reverts commit 9b68b04e.

Issue #2350695 by omega8cc, helmo: Profile is registered twice, also as a module, which causes warning

The $db_port can be empty if weird things happen to context on the fly, because it is a server and not site specific variable, thus $this->server->db_port should be used directly here.

Otherwise it is obvious that the target platform must be different if we run Migrate task.

we add safety check so that we don't get caught running d() before
drush is fully initialized. otherwise, the proper services hooks may
not be properly declared and found by drush, so the object cache
($instances) would be initialised with incomplete data.

it is possible that more initialisation we need happens after
DRUSH_BOOTSTRAP_NONE, but this is already better than nothing.

it took me and ergonlogic three freaking full days of headbanging on
keyboards to figure that stuff out.