More fixes for gitolite configuration script

More usages of undefined variable.
Corrected mistake in collection of system keys.

scripts/gitolite/rebuild_gitolite.php

@@ -54,7 +54,7 @@ class Configuration {
     $this->keys_directory = "$gitolite_root/keydir";
     $this->config_file = "$gitolite_root/conf/gitolite.conf";
 
-    $this->system_keys = $this->getSystemPublicKeys();
+    $this->collectSystemPublicKeys();
 
     if (!file_exists($this->config_file)) {
       die("Not found: $this->config_file\n");
@@ -154,7 +154,6 @@ class Configuration {
   // public key duplication in the case system key is used by phabricator user.
   protected function getSystemPublicKeys() {
     $files = scandir($this->keys_directory);
-    $system_keys = array();
     foreach ($files as $file) {
       if (startswith($file, "PHAB")) {
         continue;
@@ -167,7 +166,6 @@ class Configuration {
       $this->system_keys[$key] = $file_we;
       $this->used_keys[$file_we] = true;
     }
-    return $system_keys;
   }
 
   protected function removeUnusedPublicKeys() {
@@ -324,19 +322,19 @@ function handleCustomPolicy($config, $policy) {
     $rule_type = $rule['rule'];
     if ($rule_type == 'PhabricatorPolicyRuleUsers') {
       $policy_config_user_names =
-          handleUsersPolicyRule($system_keys, $rule);
+          handleUsersPolicyRule($config, $rule);
     } else if ($rule_type == 'PhabricatorProjectsPolicyRule') {
       $policy_config_user_names =
-          handleProjectsPolicyRule($system_keys, $rule);
+          handleProjectsPolicyRule($config, $rule);
     } else if ($rule_type == 'PhabricatorProjectsAllPolicyRule') {
       $policy_config_user_names =
-          handleProjectsAllPolicyRule($system_keys, $rule);
+          handleProjectsAllPolicyRule($config $rule);
     } else if ($rule_type == 'PhabricatorAdministratorsPolicyRule') {
       $policy_config_user_names =
-          handleAdministratorsPolicyRule($system_keys, $rule);
+          handleAdministratorsPolicyRule($config, $rule);
     } else if ($rule_type == 'PhabricatorLegalpadSignaturePolicyRule') {
       $policy_config_user_names =
-          handleLegalpadSignaturePolicyRule($system_keys, $rule);
+          handleLegalpadSignaturePolicyRule($config, $rule);
     }
 
     $config_user_names = array_merge(