* Make interface hidden behind proxy by default
* Remove expose option and replace with http_bind_port
Reasoning: This is a similar binary trigger but allows to bin not on all interfaces
* Clarify maubot admin purpose
* Remove unnecessary edif
* Extend docs to prevent common misconceptions
* Make http_bind_port singular, do not allow multiple values
* Make optional again
This shall indicate that the public url of maubot is here configured the same as matrix_server_fqn_matrix but this must not be the case.
In the config I used the matrix fqnd directly as this part of the config is directly bound to the homeserver we want to connect to (but can not use the internal)