Add save command

documentation/weechat.markdown

@@ -155,3 +155,9 @@ You can easily save it with the script `buffer_autoset.py`:
 # no hilights in channel `monitoring` by nick `xymon`
 /autosetbuffer add irc.phys.#monitoring hotlist_max_level_nicks_add xymon:0
 ```
+
+Save all options:
+
+```
+/save
+```