Index: tree/rc.html
===================================================================
--- tree/rc.html	(revision 11877)
+++ tree/rc.html	(revision 11878)
@@ -5,7 +5,7 @@
 <tr><th>node name <th> type <td> flags <td> description
 <tr><td> verbose <td><a href="CFN_INTEGER.html"> integer </a><td> 0 <td> <verbose>
 <tr><td> quiet <td><a href="CFN_INTEGER.html"> integer </a><td> 0 <td> print only errors on stderr
-<tr><td> backup_interval <td><a href="CFN_INTEGER.html"> integer </a><td> 0 <td> time between two backups in seconds
+<tr><td> backup_interval <td><a href="CFN_INTEGER.html"> integer </a><td> 0 <td> time between two backups in seconds; 0 means disabled (no backups)
 <tr><td> font_command <td><a href="CFN_STRING.html"> string </a><td> 0 <td> file name template; if not empty, run this command and read its output for loading the font; %f is the file name
 <tr><td> file_command <td><a href="CFN_STRING.html"> string </a><td> 0 <td> file name template; if not empty, run this command and read its output for loading a pcb file; %f is the file name, %p is the conf setting rc.file_path
 <tr><td> file_path <td><a href="CFN_STRING.html"> string </a><td> 0 <td> <file_path>