HAProxy is a free, very fast and reliable solution offering high
availability, load balancing, and proxying for TCP and HTTP-based
applications. It is particularly suited for very high traffic web sites.

Note that a default configuration file is no longer provided at
/etc/haproxy/haproxy.cfg. See /usr/doc/haproxy-*/examples for some
sample configuration files.

lua53 is an optional dependency for HAProxy. Pass LUA=yes to this script to
enable lua support.
