syslog-ng: enable ISODATE timestamps
syslog-ng: enable ISODATE timestamps

syslog-ng's default timestamp lacks a year and timezone information. The
"best practices" documentation recommends moving to ISODATE format,
which uses ISO 8601 timestamps. This patch follows that recommendation
(with millisecond resolution).

Signed-off-by: Jacob Champion <75c2c2dd23e821cba21c0fdd0176e024371b110b@ni.com>
Acked-by: Brad Mouring <58d99a887450796456131638ba4c43b5ba95afcf@ni.com>
Acked-by: Rich Tollerton <67c688e7f7482ba5c4ebe3d70bc77594748182a6@ni.com>
Acked-by: Ken Sharp <e6c8ad8f54d15df4645e8aaf3f7a209bc3688570@ni.com>
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Natinst-ReviewBoard-ID: 85852

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt