This has been implemented with davdroid/3b89410b. Multiple SSIDs can now be entered (using comma as separator).
There is no escaping, so SSIDs containing , are not supported anymore.
@rfc2822 My case leading to data loss.
@Creator Do you mean ICSx⁵ or DAVx⁵? How can there be data loss with ICSx⁵, when it’s only in one direction?
For DAVx⁵: Yes, if you delete the account with unsynchronized data (data inserted on the client and sync was never run), these data are lost.
Editing the server URL is not really possible, because internally this is a very complex matter and there are many possibilities for data loss because data has internally to be copied partially (only the unsynced data?) to a new calendar/address book. There are so many cases where this could result in chaos, so we probably will never add this feature. All you can do is create the second account, export unsynced data manually on the device from the first account and import it to the newly created second account. There are helper apps like ical Import/Export afaik.