Improvements to Safari WebRTC interop and SFU listen only

Also fixed a resource leak on listen only fallback and transitioned the SFU listen only from a tag-based approach to MediaStream

Maintain array of user roles so they are unique

Add `filename` attribute for file pre-upload using an URL

Recording fixes for BBB 2.0

It was previously trying to get the presentation name from the wrong variable,
which resulted in a nil value (which was treated as a blank string in
filenames). This caused the poll images to not be inside the presentation
subdirectories, and the poll image references in the svg contained a `//`
path, which would break the recording if it was uploaded to e.g. AWS S3.

Improve client logging for screensharing

Reduce adapter.js version in Flash client

Revert "Update API to display if the user is sharing his screen and what screen-sharing type he is using."

This reverts commit 72d7e17f.

Update adapter.js in the Flash client and make sure it loads in correct order

Fix error handling when client parts fail to load

Improve codec availability detection in SFU

Make Flash WebRTC screenshare use RTMPS when available

Make it so that cameras use the full space of the video window

This fixes font scaling in the presentation area, since that relied on
the <p> element inheriting the font size from the svg <g> that it was
inside of.

This was broken with the switch to the Foundation stylesheet base, which
set a fixed font size on the <p> element.

Fix WebRTC screenshare RTMP URL regular expression

Fix lock settings

Add a specific log message when falling back to rtmp ipv4

Add RTMP fallback for IPv4-only hostname to the client

Fix screenshare edge case with presenter switch