Make some systemic improvements

- add vdso dump utility
- tests now log stack usage
- rename g_ftrace to __ftrace
- make internal spinlocks go faster
- add conformant c11 atomics library
- function tracing now logs stack usage
- make function call tracing thread safe
- add -X unsecure (no ssl) mode to redbean
- munmap() has more consistent behavior now
- pacify fsync() calls on python unit tests
- make --strace flag work better in redbean
- start minimizing and documenting compiler flags

libc/calls/internal.h

@@ -62,7 +62,6 @@ struct Fd {
   unsigned mode;
   int64_t handle;
   int64_t extra;
-  struct NtStdinWorker *worker;
   bool zombie;
 };
 
@@ -90,9 +89,12 @@ void __releasefd(int) hidden;
 void __releasefd_unlocked(int) hidden;
 int __ensurefds(int) hidden;
 int __ensurefds_unlocked(int) hidden;
-int64_t __getfdhandleactual(int) hidden;
 void __printfds(void) hidden;
 
+forceinline int64_t __getfdhandleactual(int fd) {
+  return g_fds.p[fd].handle;
+}
+
 forceinline bool __isfdopen(int fd) {
   return 0 <= fd && fd < g_fds.n && g_fds.p[fd].kind != kFdEmpty;
 }