Remove jimg
Rename CDN log filename

Reflects the service name in Fastly. Long live Bouncer.
Move transition-logs dev certs to common.yaml

The hiera lookup order meant that an entry in `role.transition-logs.yaml`
would always win over `env.production.yaml`. So the development cert/key was
being deployed to production.
Generalise rsyslog template name.
[#59323898] Daily rotate and dateext for CDN logs

Rotate the CDN logs daily, rather than monthly, because they are expected to
grow fast and it matches the rate that the Transition team are expecting to
consume them. The retention period of one year remains the same.

Also append a date to each log when it's rotated. Rather than a rotating
integer, so that it's easy to see what period each log relates to.
[#59323898] Move CDN logs to separate mount

The existing path belongs to the root partition, which isn't very big. Move
it to `/srv/logs/log-1` which is created by `ci_environment::transition_logs`
and lives on a separate partition:
```
dcarley@transition-logs-1:~$ df -h / /srv/logs/log-1/
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda2       9.4G  2.7G  6.3G  31% /
/dev/sdb1       252G   54G  199G  22% /srv/logs/log-1
```

The old dir/log should be deleted after deploying.
Merge pull request #103 from alphagov/59323898-cdn_log_daily_rotate

[#59323898] Daily rotate and dateext for CDN logs
Merge pull request #104 from alphagov/59323898-cdn_logs_on_separate_mount

[#59323898] Move CDN logs to separate mount
[#59323898] Remove formatting for CDN logs

Record CDN access logs without any additional syslog formatting/info. The
`:2:$:` formatter prints everything after the first character, in order to
remove syslog's default preceding space.

We've opted not to use Sam's snippet for prefixing the log line with a
formatted `%timestamp%`/`%timereported%` because discrepencies between the
syslog time and `%t` generated by the CDN make us nervous that it isn't
accurate enough.

Instead we'll put up with their format and quote it, so that it's easier to
pass. We're also omitting a lot of information that the Transition team
don't need and would be sensitive for privacy reasons. Resulting in a final
formatting config of:
```
req.http.host "%t" "%r" %>s %b
```
Merge pull request #102 from alphagov/59323898-cdn_logs_formatting

[#59323898] Remove formatting for CDN logs
Test mawk 1.3.4 against Alex's PPA