jailkit: fix php warnings (closes #6036)

Author: jnorell

server/lib/classes/system.inc.php

@@ -2412,6 +2412,7 @@ public function create_jailkit_user($username, $home_dir, $user_home_dir, $shell
 
 	public function create_jailkit_chroot($home_dir, $app_sections = array(), $options = array()) {
 		global $app;
+$app->log("create_jailkit_chroot: called for home_dir $home_dir with options: " . print_r($options, true), LOGLEVEL_DEBUG);
 
 		// Disallow operating on root directory
 		if(realpath($home_dir) == '/') {
@@ -2428,6 +2429,9 @@ public function create_jailkit_chroot($home_dir, $app_sections = array(), $optio
 		} elseif(is_string($app_sections)) {
 			$app_sections = preg_split('/[\s,]+/', $app_sections);
 		}
+		if(! is_array($options)) {
+			$options = (is_string($options) ? preg_split('/[\s,]+/', $options) : array());
+		}
 
 		// Change ownership of the chroot directory to root
 		$this->chown($home_dir, 'root');
@@ -2485,6 +2489,7 @@ public function create_jailkit_chroot($home_dir, $app_sections = array(), $optio
 
 	public function create_jailkit_programs($home_dir, $programs = array(), $options = array()) {
 		global $app;
+$app->log("create_jailkit_programs: called for home_dir $home_dir with options: " . print_r($options, true), LOGLEVEL_DEBUG);
 
 		// Disallow operating on root directory
 		if(realpath($home_dir) == '/') {
@@ -2501,6 +2506,9 @@ public function create_jailkit_programs($home_dir, $programs = array(), $options
 		} elseif(is_string($programs)) {
 			$programs = preg_split('/[\s,]+/', $programs);
 		}
+		if(! is_array($options)) {
+			$options = (is_string($options) ? preg_split('/[\s,]+/', $options) : array());
+		}
 
 		# prohibit ill-advised copying paths known to be sensitive/problematic
 		# (easy to bypass if needed, eg. use /./etc)