Thomas Haller authored Jun 27, 2018 and Beniamino Galvani committed Aug 08, 2018

In general, a activatable connection is one that is currently not
active, or supports to be activatable multiple times according to
multi-connect setting. In addition, during autoconnect, a profile
which is marked as multi-connect=manual-multiple will not be avalable.
Hence, add an argument "for_auto_activation".

The code is mostly unused but will be used next (except for connections,
which set connection.multi-connect=multiple).