random 404s on security.ubuntu.com for libgd2 packages

[vdloo]

Hi, when I try to apt-get upgrade from xenial-security I get 404s from some of the security.ubuntu.com mirrors. Not sure if this is the place to report it but it seems to be related to https://launchpad.net/ubuntu/+source/libgd2/2.1.1-4ubuntu0.16.04.11/+publishinghistory.

```
vdloo@workstation4:/tmp/gd2$ curl -s -I http://security.ubuntu.com/ubuntu/pool/main/libg/libgd2/libgd3_2.1.1-4ubuntu0.16.04.11_amd64.deb | grep HTTP
HTTP/1.1 200 OK
vdloo@workstation4:/tmp/gd2$ curl -s -I http://security.ubuntu.com/ubuntu/pool/main/libg/libgd2/libgd3_2.1.1-4ubuntu0.16.04.11_amd64.deb | grep HTTP
HTTP/1.1 200 OK
vdloo@workstation4:/tmp/gd2$ curl -s -I http://security.ubuntu.com/ubuntu/pool/main/libg/libgd2/libgd3_2.1.1-4ubuntu0.16.04.11_amd64.deb | grep HTTP
HTTP/1.1 404 Not Found
vdloo@workstation4:/tmp/gd2$ curl -s -I http://security.ubuntu.com/ubuntu/pool/main/libg/libgd2/libgd3_2.1.1-4ubuntu0.16.04.11_amd64.deb | grep HTTP
HTTP/1.1 200 OK
```

This happened a while back as well for avahi: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1814105

[vdloo (rickvandeloo)]

Looks like this has been fixed.

/tmp$ for i in {1..10}; do curl -s -I http://security.ubuntu.com/ubuntu/pool/main/libg/libgd2/libgd3_2.1.1-4ubuntu0.16.04.11_amd64.deb | grep HTTP; done
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK