Elevate Windows production worthiness

- SQLite file locking now works on Windows
- SQLite will now use fdatasync() on non-Apple platforms
- Fix Ctrl-C handler on Windows to not crash with TLS
- Signals now work in multithreaded apps on Windows
- fcntl() will now accurately report EINVAL errors
- fcntl() now has excellent --strace logging
- Token bucket replenish now go 100x faster
- *NSYNC cancellations now work on Windows
- Support closefrom() on NetBSD

libc/calls/calls.h

@@ -95,7 +95,6 @@ int fchownat(int, const char *, uint32_t, uint32_t, int);
 int fcntl(int, int, ...);
 int fdatasync(int);
 int flock(int, int);
-int lockf(int, int, int64_t);
 int fork(void);
 int fsync(int);
 int ftruncate(int, int64_t);