Add /xban_cleanup command to purge unbanned entries (#20)

Add documentation for /xban_cleanup

1 files changed, 6 insertions, 0 deletions

diff --git a/README.md b/README.md
index 90eed0d..75f8e88 100644
--- a/README.md
+++ b/README.md
@@ -104,3 +104,9 @@ the supported import plugins at the time of writing:
 * `v2`: Old format used by xban (`players.iplist.v2`).
 
 **Example:** `/xban_dbi minetest`
+
+### `xban_cleanup`
+
+Removes all non-banned entries from the xban db.
+
+**Usage:** `/xban_cleanup`