NLog/NLog — pull request #369 by cvanbergen (2014-06-16 12:24:46+00:00)
Title: Add of archiveOldFileOnStartup parameter in FileTarget

This adds the possibility of archiving an existing log file every time an application starts. As described/proposed in #213.
The added parameter for the File target is archiveOldFileOnStartup.

The following config will archive the current log file each time the application is started.
```xml

```
(The xsd and wiki needs to be updated if this PR is accepted)