Minor improvement for Windows in filefuncs.c.
Add another task to TODO.
Fix for MinGW in extension/filefuncs.c.
Remove an email address of a bug reporter by request.
Quote $(srcdir) in test makefiles.
Whitespace fix in debug.c.
Fix in array.c.
Move FAKE_FD_VALUE to shared header.
Clean up some -Wextra compile warnings in extensions.