various installation problems

Description: Ubuntu 16.04.1 LTS
Release: 16.04
dokuwiki:
  Installed: 0.0.20140929.d-1ubuntu1
  Candidate: 0.0.20140929.d-1ubuntu1

Installation of Dokuwiki still has various problems.

Updates related to previous reports:
1) An Apache conf symlink seems now to be created: /etc/apache2/conf-enabled/dokuwiki.conf -> ../conf-available/dokuwiki.conf
2) Dokuwiki package does not seem to include dependencies libapache2-mod-php7.0 and php7.0-xml (as required by Dokuwiki developers: https://www.dokuwiki.org/install:ubuntu)

In addition:
3) The provided apache.conf defaults to localhost accessibility only (atypical scenario for a wiki?)
4) Dokuwiki needs /usr/share/dokuwiki/data to be writable: the data directory is actually in /var/lib/dokuwiki
5) Dokuwiki needs write permissions for /var/lib/dokuwiki/data/ and /var/lib/dokuwiki/acl/ directories
6) Additional permissions are required to run configuration/installation script install.php or to save changes in web configuration interface: Admin -> Configuration settings

I found solutions for 3-6, but any feedback on the security of these solutions would be much appreciated:
3') In /etc/dokuwiki/apache.conf change:
    Allow from localhost 127.0.0.1 ::1
      to:
    Allow from All
4') Make softlink /usr/share/dokuwiki/data -> /var/lib/dokuwiki/data/
5') Change owner of /var/lib/dokuwiki/data/ and /var/lib/dokuwiki/acl/ to "www-data", group "root"
6') Make softlink /usr/share/dokuwiki/conf -> /etc/dokuwiki and change owner of /etc/dokuwiki/local.php to "www-data", group "root"

Finally, warnings remain in /var/log/apache2/error.log:
PHP Warning: Declaration of action_plugin_authad::register(Doku_Event_Handler &$controller) should be compatible with DokuWiki_Action_Plugin::register(Doku_Event_Handler $controller) in /var/lib/dokuwiki/lib/plugins/authad/action.php on line 0, referer: [removed by poster]