More and more used filedescriptor after every reload

[Csurgi]

More and more filedescriptor used after configuration reload.

I have a hitch with 8 worker, and after I reload the config it's using 8 more fd after every reload.
Using:
hitch 1.4.6 from source with ./configure --prefix=/usr --sysconfdir=/etc
Under:
Ubuntu 15.10 Wily (because of openssl 1.0.2)

I'm using about 26k certificate, and reloading config after some minutes if any of them has been changed.
After starting hitch it's using 6 filedescriptors, after reloads it's using 14, 22, 30 .. 8006, etc.
There is no traffic, it's a test system now.

Configuration without certificates:
`

workers = 8
quiet = on
user = "hitch"
group = "hitch"
ocsp-dir = ""
ocsp-verify-staple = on
syslog = off
syslog-facility = "daemon"
write-proxy-v2 = on
alpn-protos = "http/2,http/1.1"
frontend = "[*]:443"
backend = "[127.0.0.1]:6086"
tls-protos = TLSv1.1 TLSv1.2
sni-nomatch-abort = off
prefer-server-ciphers = on
ciphers = "ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS

"
`

[gquintard]

@Csurgi would you mind trying master and see if you can reproduce? I believe this has been fixed in 0cef088.

If not, please re-open.