Fix some Windows-related problems.

- Fix an error relating to the unavailability of std::back_inserter.
- Fix loading configuration files when using relative paths.
- Fix two methods in hashcomp being exported twice.
- Remove some unimportant error messages.
Add functor that does strict weak ordering based on national_case_insensitive_map
Change type of snomask parameter to char in ProtocolInterface::SendSNONotice()