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