The default OS websites would override all the default http sites.
I removed those default http sites from the file and put them in
the minifirewall_http_sites list. Since this would override the
list anyway, it doesnt change much, except that someone who doesnt
want to use the OS default websites should also override the related
variables (minifirewall_default_*_http_sites)
fixes#65
Ubuntu and Debian do not use the same apt sources. I created two
new default variables (minifirewall_default_xxx_http_sites) that
contain a list of the sites required for apt to work. I then removed
the debian sites from the default file and added two new tasks to
prepend the contents of these variables to HTTPSITES.
fixes#65
Each role has to know how to deal with the other.
Otherwise, depending on order of execution, the firewall might not
allow connections for evomaintenance