Implement support for config file change detection, which can detect external
edits to the server configuration (e.g., manually updating the file in a text
editor) with the server online.  If the server detects that the configuration
file has been externally modified when it needs to rewrite it to apply a change
coming in through protocol, then it will attempt to copy the manually-edited
file off to the side and will generate an administrative alert and write a log
message to let administrators know what happened.

OpenDS Issue Number:  169