[support] Drupal multi sites

[Roger]

Is it possible to have a drupal base install that is not used other than 
for multi sites.
Where the base install is not a registered domain, just a container.

/var/www/html/devel is the base working drupal installation.

/sites/site1, sites/site2 etc are registered domains.

/etc/http/conf/httpd.conf has:

#-------------------Base install
<VirtualHost *:80>
         ServerName devel
         DocumentRoot /var/www/html/devel
</VirtualHost>
#------------------ALL Devel  multi sites listed here
<VirtualHost *:80>
         ServerName devel.site1
         DocumentRoot /var/www/html/devel
</VirtualHost>
<VirtualHost *:80>
         ServerName devel.site2
         DocumentRoot /var/www/html/devel
</VirtualHost>