As WordPress fucks up XML: Code fragment from https://wiki.apache.org/httpd/NameBasedSSLVHostsWithSNI#Changes_in_configuration_to_use_SNI

apache-sni-vhost.conf

# Ensure that Apache listens on port 443
Listen 443
    
# Listen for virtual host requests on all IP addresses
NameVirtualHost *:443

# Go ahead and accept connections for these vhosts
# from non-SNI clients
SSLStrictSNIVHostCheck off

<VirtualHost *:443>
  # Because this virtual host is defined first, it will
  # be used as the default if the hostname is not received
  # in the SSL handshake, e.g. if the browser doesn't support
  # SNI.
  DocumentRoot /www/example1
  ServerName www.example.com

  # Other directives here

</VirtualHost>

<VirtualHost *:443>
  DocumentRoot /www/example2
  ServerName www.example2.org

  # Other directives here

</VirtualHost>