Steps to reproduce:

1. Install zabbix Haproxy from Debian official packages (or backports)
2. Activate template HAproxy by zabbix-agent (https://www.zabbix.com/integrations/haproxy).

Result:

The version is not correctly parsed:

Preprocessing failed for: HTTP/1.1 200 OK..cache-control: no-cache..content-type: text/html..refresh: 10..transfer-encoding...
1. Failed: HAProxy version is not found : TypeError: cannot read property 1 of null

Expected:

The version is: 2.0.13-2~bpo10+1 or 2.0.13

Workaround:

try {
// return value.match(/HAProxy version (\d+\.\d+\.\d+),/)[1];
   return value.match(/HAProxy version (\d+\.\d+\.\d+)-/)[1];
}
catch (error) {
   throw "HAProxy version is not found : " + error;
}