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/sysv/syscount.S

@@ -0,0 +1,51 @@
+/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8     -*-│
+│vi: set et ft=asm ts=8 tw=8 fenc=utf-8                                     :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/macros.internal.h"
+
+//	RII System Five system call counter.
+//
+//	Referencing this symbol will cause systemfive() to be hooked
+//	for the purpose of counting non-Windows system calls. Please
+//	note wrappers may still short circuit calls sometimes, which
+//	wouldn't impact this counter.
+	.bss
+	.align	8
+__syscount:
+	.quad	0
+	.endobj	__syscount,globl
+	.previous
+
+	.initbss 701,_init___syscount
+__syscount_next:
+	.quad	0
+	.endobj	__syscount_next
+	.previous
+
+syscount:
+	incq	__syscount(%rip)
+	jmp	*__syscount_next(%rip)
+	.endfn	syscount
+	.previous
+
+	.init.start 701,_init___syscount
+	mov	__systemfive(%rip),%rax
+	stosq
+	ezlea	syscount,ax
+	mov	%rax,__systemfive(%rip)
+	.init.end 701,_init___syscount