Added a bunch of Gentoo modules.d/ scripts (todo: read & adapt these gems).

For (mod_...) :
   * evasive, modsecurity & its Common Rule Set thing ;
   * bw, loadavg ;
   * perl, python, ruby, suphp ;
   * scgi, fastcgi, fcgid ;
   * musicindex ;
   * tidy ;
   * proxy_html
Moved var/www/ up a level; updated vhosts (default & sample)
mod_dav{,_fs} config. + www/default/dav/ (basic auth against ldap1).
conf/httpd.conf : Added missing ServerName directive.

For when Apache can't guess it, specifically from home desktop with
no belonging domain.
README.md : Some more todos...