I'm in the process of configuring my new TS-219 (using the BETA firmware). On my old TS-209, I'm hosting some domains, mostly subdomains. I copied the relevant parts from my old apache.conf and pasted them into the new apache.conf
# Use name-based virtual hosting.
# The VirtualHost directive takes precedence over the above (generic) 'DocumentRoot "/share/Qweb"' (line 26) directive
# It is therefore necessary to specify general 'catch all' document root here again ...