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/strace.internal.h

@@ -4,6 +4,7 @@
 #include "libc/calls/struct/rlimit.h"
 #include "libc/calls/struct/sigaction.h"
 #include "libc/calls/struct/stat.h"
+#include "libc/runtime/runtime.h"
 
 #define _KERNTRACE 0 /* not configurable w/ flag yet */
 #define _POLLTRACE 0 /* not configurable w/ flag yet */
@@ -50,8 +51,6 @@ COSMOPOLITAN_C_START_
 #define NTTRACE(FMT, ...) (void)0
 #endif
 
-extern int __strace;
-
 void __stracef(const char *, ...);
 
 COSMOPOLITAN_C_END_