Add ability to change app-name on syslog

[jcaruso]

It would be great if we had the ability to specify a string that was included in all syslog messages.

Please see this relevant RFC for syslog
https://tools.ietf.org/html/rfc5424#section-6.2.5

6.2.5. APP-NAME

The APP-NAME field SHOULD identify the device or application that
originated the message. It is a string without further semantics.
It is intended for filtering messages on a relay or collector.

The NILVALUE MAY be used when the syslog application has no idea of
its APP-NAME or cannot provide that information. It may be that a
device is unable to provide that information either because of a
local policy decision, or because the information is not available,
or not applicable, on the device.

This field MAY be operator-assigned.


I have a central server that I would like to use to collect our syslogs from remote locations. However, currently if you point more than one device to that IP they cannot be filtered except by IP. Since they all have the same IP then they all go into one log file.

Having the app-name field would let me filter based on IP plus a unique string assigned to each phone.