MINOR: doc: http-reuse connection pool fix

Since 1.9 we actually do use a connection pool, configurable with
pool-max-conn.

Update the documentation in this regard.

Must be backported to 1.9.

(cherry picked from commit e8adfeb84b4a1845c41fd23126b80d64c7c59863)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed