Brian Goff 70ca1da8d3 Refactor log file writer ...

Make the `*RotateFileWriter` specifically about writing
`logger.Message`'s, which is what it's used for.

This allows for future changes where the log writer can cache details
about log entries such as (e.g.) the timestamps included in a particular
log file, which can be used to optimize reads.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 52d82b4fbc9f0fe00f63e2df9a3d2a49d4095bda
Component: engine

2017-11-04 08:15:20 -04:00

..

engine

Refactor log file writer

2017-11-04 08:15:20 -04:00