sincedb write fails under windows with "permission" error

[jweite]

tail.rb _sincedbwrite renames the newly written tmp sincedb over the previously existing one. This is failing with a "permission error" under Windows (7). I added code to (conditionally under windows only) delete the pre-existing sincedb file before the rename and the sincedb writes succeed. If the delete fails I log but leave both in place - the tmp sincedb file should be overwritten next time around.

-Joe Weitekamp

[bradvido]

I can confirm i get this error as well on windows. I see "_sincedb_write rename/sync failed" ... "Permission denied" in the logs every time it's attempted