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/printfds.c

@@ -54,7 +54,6 @@ void __printfds(void) {
     if (g_fds.p[i].mode) kprintf(" mode=%#o", g_fds.p[i].mode);
     if (g_fds.p[i].handle) kprintf(" handle=%ld", g_fds.p[i].handle);
     if (g_fds.p[i].extra) kprintf(" extra=%ld", g_fds.p[i].extra);
-    if (g_fds.p[i].worker) kprintf(" worker=%p", g_fds.p[i].worker);
     kprintf("\n");
   }
   _spunlock(&__fds_lock);