Fix wrong log routing on EL7

[GElkayam]

• Avoid haproxy logs that are echoed from systemd-journal (errors getting send again as severity 6) by limiting source to UDP input
• Correct scoping to avoid unreachable code due to stop, and errors not logged to correct log
• Fix indentation

[rgvsilva]

Hello @DBezemer, can we get that reviewed and merged?

[DBezemer]

In cases with systemd-journal re-echoing errors the condition

if $programname startswith 'haproxy'

should not be true, so I struggle to see what issue this fixes. Can you let me know how I can reproduce the issue you're seeing and I'll see if there's a more elegant solution.

[GElkayam]

Hi @DBezemer ,
Thanks for your response.
There are several fixes to this PR.

1. All messages are sent to the same log - due to missing curly brackets on the if statements
2. Messages are logged twice - On the system I worked, systemd-journal was resending, and the programname was the same. RHEL 7.6. I don't have access right now, but I can try and get the specific config if needed.

On my systems, I had to override anyway to send the logs to a custom folder, but wanted to contribute the fix upstream.

[DBezemer]

Sorry for the delay, finally got around to testing this and will also merge into dev for build