Appending "api_jsonrpc.php" to $this->zabbix_url in Zabbix class constructor, this prevents login failure when automatic login is enabled and makes it consistent with setting of similar url variables in the constructor ($this->zabbix_url_chart and $this->zabbix_url_index)
Merge pull request #40 from drianpauL/bug/issue39-noautologin

Proposed fix for Issue 39 - Append "api_jsonrpc.php" to $this->zabbix_url in Zabbix class ctor