apache2 sites-enabled are not symlinks anymore and /autodiscover/autodiscover.xml alias

Hello everyone,

From somedays ago I have seen in a few servers some strange things.

1 The symlinks in sites-enabled are not symlinks anymore but they are ordinary text files like sites-avaiable.

2 New config has been addedd to my vhosts files:

ScriptAlias /autodiscover/autodiscover.xml Redirect /mail/config-v1.1.xml /cgi-bin/autoconfig.cgi
Redirect /.well-known/autoconfig/mail/config-v1.1.xml

What module has addedd this lines?

3 A /etc/apache2/sites-enabled/webmin.{aleatorynumberhere}.conf has been addedd to the apache configuration.

What is all these for?

Thank you.