there was a call of grep which failed when the config file does not
exist yet. check existance of file first.

operators can define their own config for bbb-web which will not be
overwritten by packages.

bbb-conf is changed accordingly to write configuration values to
``/etc/bigbluebutton/bbb-web.properties`

operators can define their own config for bbb-web which will not be
overwritten by packages.

bbb-conf is changed accordingly to write configuration values to
``/etc/bigbluebutton/bbb-web.properties`

This change introduces a config file
`/etc/bigbluebutton/bbb-fsesl-akka.conf` which reads the default config
from packages and allows operators to keep their own config file changes
across package upgrades.

bbb-conf is adjusted to deal with this change.

config files from packages should not be changed unless they reside in
/etc

Most of the changes date back to #10700 
We were trying to trace down a problematic change likely when merging 2.2.31 into 2.3 ( #11033 )
If anyone spots issues with bbb-conf on their 2.3 server, please comment

Change http:// to https://

fixed typo

Empty After= may confuses systemd

This patch fixes a typo in bbb-record causing problems by checking the
bigbluebtuuon user.

This patch modifies `bbb-record` allowing the user `bigbluebutton` to
delete recordings. The user has all necessary access rights, meaning
that the deletion works without a problem and the check for root does
not protect anything. The users owns the data after all. The current
check just makes things less convenient.

Currently, `bbb-record` uses a bunch of different style for indentation,
sometimes tabs, sometimes to, three or four spaces and these are
sometimes mixed on a line by line basis, making it hard to read and to
get what's going on.

This is a simple patch making the style of `bbb-record` consistent by
using three spaces for indentation which seemed to be the most commonly
used type of indentation here.