squash some compiler warnings
work around Win32 rename() issue using native API
Fix AddServerThrottle.
Merge pull request #481 from KiNgMaR/squash-some-warnings

squash some compiler warnings
Merge pull request #482 from KiNgMaR/win32-file-move

work around Win32 rename() issue using native API
Patch ZNC core for more control over singleton...
Use CZNC::DestroyInstance().
Merge pull request #484 from KiNgMaR/singleton

Allow more control over CZNC singleton