Switch to using NOTICE log level for file change messages.

Otherwise the message is preceded with an error tag, which is not
really the case.
(cherry picked from commit 3b3c516858e37a04171f97d77b9282dea5b5d8af)
Update ChangeLog with change of file change message log level
Merge remote-tracking branch 'upstream/3.5.x' into 3.5_surfsara