Merge branch '0.7.x' into 0.8.x

config.php.sample

@@ -31,6 +31,8 @@ $config['site']['path'] = 'laconica';
 #$config['site']['closed'] = true;
 #Only allow registration for people invited by another user
 #$config['site']['inviteonly'] = true;
+#Make the site invisible to  non-logged-in users
+#$config['site']['private'] = true;
 
 # If you want logging sent to a file instead of syslog
 #$config['site']['logfile'] = '/tmp/laconica.log';