Make both send_curl_request and send_http_request and getMessage stat…

…ic functions (#23)

* Make both send_curl_request and send_http_request static functions

Am getting this in the log:

rrorException from line 410 of /srv/mediawiki/w/extensions/DiscordNotifications/DiscordNotificationsCore.php: PHP Deprecated: Non-static method DiscordNotifications::send_curl_request() should not be called statically

* Update DiscordNotificationsCore.php

DiscordNotificationsCore.php

@@ -412,7 +412,7 @@ static function push_discord_notify($message, $user, $action)
 		}
 	}
 
-	private function send_curl_request($url, $postData) {
+	private static function send_curl_request($url, $postData) {
 		$h = curl_init();
 		curl_setopt($h, CURLOPT_URL, $url);
 		curl_setopt($h, CURLOPT_POST, 1);
@@ -425,7 +425,7 @@ private function send_curl_request($url, $postData) {
 		curl_close($h);
 	}
 
-	private function send_http_request($url, $postData) {
+	private static function send_http_request($url, $postData) {
 		$extradata = array(
 			'http' => array(
 			'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
@@ -437,7 +437,7 @@ private function send_http_request($url, $postData) {
 		$result = file_get_contents($url, false, $context);
 	}
 
-    private function getMessage($key) {
+    private static function getMessage($key) {
 		return wfMessage( $key)->text();
     }
 }