MINOR: counters: fix a typo in comment

Wrong copy/paste comment, replace listeners/frontends by
servers/backends

This may be backported up to 1.7.

(cherry picked from commit cd3de507794b4f063aa1e7f43b55b27998d7ee7d)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit dc0b2880d87458ceafedbbeb5051ece149adfa6e)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 333b5e67877600763fc44e54acc6aae2f1b894da)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed