Run BAM! reverse-proxy at port 80

[Jonhnny Weslley]

Currently, BAM! requires some firewall rules in order to requests reaches the reverse-proxy. These firewall rules require extra-configuration and could be eliminated if BAM!'s reverse-proxy binds to port 80. But, since port 80 is a privileged port, BAM will need to run as a privileged user too. This can be dangerous, applications running with privileged access. Thus, an alternative could be allow to run applications with a different user. Similar to nginx, which allows to run worker processes as an another user.