MINOR: dns: add DNS statistics
add a new command on the stats socket to print a DNS resolvers section
(including per server) statistics: "show stats resolvers <id>"
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 61f1132..63a2830 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -15257,6 +15257,23 @@
A similar empty line appears at the end of the second block (stats) so that
the reader knows the output has not been truncated.
+show stat resolvers <resolvers section id>
+ Dump statistics for the given resolvers section.
+ For each name server, the following counters are reported:
+ sent: number of DNS requests sent to this server
+ valid: number of DNS valid responses received from this server
+ update: number of DNS responses used to update the server's IP address
+ cname: number of CNAME responses
+ cname_error: CNAME errors encountered with this server
+ any_err: number of empty response (IE: server does not support ANY type)
+ nx: non existent domain response received from this server
+ timeout: how many time this server did not answer in time
+ refused: number of requests refused by this server
+ other: any other DNS errors
+ invalid: invalid DNS response (from a protocol point of view)
+ too_big: too big response
+ outdated: number of response arrived too late (after an other name server)
+
show table
Dump general information on all known stick-tables. Their name is returned
(the name of the proxy which holds them), their type (currently zero, always