Better random number gen and fix for travis

.travis.yml

@@ -6,6 +6,10 @@ php:
   - '7.0'
   - hhvm
   - nightly
+matrix:
+  allow_failures:
+    - php: hhvm
+    - php: nightly
 services:
   - mysql
 before_install:

include/php/classes/Auth.php

@@ -226,7 +226,16 @@ class Auth
 	 */
 	public static function generatePasswordHash($password)
 	{
-		$salt = base64_encode(rand(1, 1000000) + microtime());
+		if(function_exists('mt_rand')){
+			mt_srand(time());
+			$num = mt_rand(1, 100000);
+		}
+		else{
+			srand(time());
+			$num = rand(1, 100000);
+		}
+
+		$salt = base64_encode($num);
 		$schemaPrefix = static::getPasswordSchemaPrefix();
 
 		$hash = crypt($password, $schemaPrefix.$salt.'$');