DOC: map_beg was missing from the table of map_* converters
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 1faee6c..3f57806 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -9690,6 +9690,8 @@
   -----------+--------------+-----------------+-----------------+---------------
     str      | str          | map_str         | map_str_int     | map_str_ip
   -----------+--------------+-----------------+-----------------+---------------
+    str      | beg          | map_beg         | map_beg_int     | map_end_ip
+  -----------+--------------+-----------------+-----------------+---------------
     str      | sub          | map_sub         | map_sub_int     | map_sub_ip
   -----------+--------------+-----------------+-----------------+---------------
     str      | dir          | map_dir         | map_dir_int     | map_dir_ip