Bridge turns on encryption in existing Matrix room

[vranki]

(Scenario is existing Matrix room to new WA room)

Steps to reproduce:

1. Invite bot to room
2. Give bot admin permissions (yes, this is wrong. It works with PL0)
3. Bridge
4. Bot turns on encryption in room, which cannot be reversed

Encryption can't be turned off, so in practice the Matrix room is now unusable and must be recreated.

[tulir]

Is bridge->encryption->default set to true?

[zouppen]

This is very bad in multi-bridged rooms where some of the bridges do not yet support end-to-end encryption such as matrix-appservice-irc

[zouppen]

Is bridge->encryption->default set to true?

It is not set at all, so the default value, whatever it is.

[zouppen]

We bridged the channel using !wa relaybot create and it turned the encryption on. The configuration doesn't have encryption setting. (We followed this https://docs.mau.fi/bridges/go/whatsapp/relaybot.html#creating-a-new-whatsapp-group-for-an-existing-matrix-room )