Add Windows Support for the .logstash-forwarder file from overwrite to rewrite

[aldofunes]

This code was taken from Pull Request 273

I am using the latest logstash-forwarder version though, because the implementation of Pull Request 273 fails with this version.

I am fairly new to GitHub, so here is the message from sdgroot:

Here is what
Due to the use of the 'defer' keyword, file handles were kept open too long. This resulted in the error 'The process cannot access the file because it is being used by another process.'.

Another addition is for opening the file .logstash-forwarder. Initially this file will not exist. The Registar for Windows assumes this file exists. Therefore we explicitly tell the OS to create the file when it doesn't exist yet.

See also https://groups.google.com/forum/#!topic/logstash-users/oFDcoGj8Qtc

[justmara]

there is #272 wich is already rebased to new code and is still working.

[ruflin]

This should be fixed in filebeat (next version of logstash-forwarder) with https://github.com/elastic/filebeat/pull/43 and https://github.com/elastic/filebeat/pull/45

[ruflin]

As the next release of logstash-forwarder will be filebeat, I will close this issue based on the comment above. In case the issue still exists in filebeat, please reopen or open a new issue directly in the filebeat repo.