MINOR: resolvers: Clean server in a dedicated function when removing a SRV item

A dedicated function is now used to clean up servers when a SRV item becomes
obsolete or when a requester is removed from a resolution. This patch is
mandatory to fix a bug.

(cherry picked from commit 11c6c396560107ac892a553bfa0dada222823b1c)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed