* add missing dependency on php5-gd
* remove all hardcoded paths
* rework README.OpenBSD
* add empty zabbix.conf.php file that is writable by the www user so
that the configuration wizard can tweak this file
* protect configuration files, they may contain passwords
* fix configuration so that it works by default which is the purpose of
porting these kinds of apps
ok sthen@, ok jasper@ on a previous version of the diff