Fix more things

- Update a couple unicode data files
- Disable strace during logger calls
- SQLite now uses pread() / pwrite()
- pread() past EOF on NT now returns 0
- Make the NT mmap() and fork() code elegant
- Give NT a big performance boost with memory
- Add many more mmap() tests to prove it works

libc/calls/unlinkat.c

@@ -29,6 +29,8 @@
 /**
  * Deletes inode and maybe the file too.
  *
+ * This may be used to delete files and directories and symlinks.
+ *
  * @param dirfd is normally AT_FDCWD but if it's an open directory and
  *     path is relative, then path becomes relative to dirfd
  * @param path is the thing to delete