Curl replacement for file_get_contents

Please add a CURL replacemente for file_get_contents function, so the plugin can work even on hosting with allow_url_fopen=0.

I’ve added a public function in class.attachment.php

public function file_get_contents_curl($url) {
			$ch = curl_init();
			
			curl_setopt($ch, CURLOPT_HEADER, 0);
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //Set curl to return the data instead of printing it to the browser.
			curl_setopt($ch, CURLOPT_URL, $url);
			
			$data = curl_exec($ch);
			curl_close($ch);
			
			return $data;
		}

and changed the call on line 270 to

$optimized_file = $this->file_get_contents_curl( $optimized_img_url );

(code for function file_get_contents_curl taken here)