Webseer and CURL

[xmacan]

Webseer needs CURL but this information isn't in readme. I have installed webseer, try to configure server and got:

Fatal error: Uncaught Error: Call to undefined function curl_init() in /usr/local/share/cacti/plugins/webseer/classes/cURL.php:67 Stack trace: #0 /usr/local/share/cacti/plugins/webseer/includes/functions.php(87): cURL->post('http://kaktus.k...', Array) #1 /usr/local/share/cacti/plugins/webseer/webseer_servers_edit.php(93): plugin_webseer_refresh_urls() #2 /usr/local/share/cacti/plugins/webseer/webseer_servers_edit.php(39): webseer_save_server() #3 {main} thrown in /usr/local/share/cacti/plugins/webseer/classes/cURL.php on line 67

I guess that there should be a test for curl extension.