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

third_party/dlmalloc/dlmalloc.mk

@@ -49,10 +49,17 @@ $(THIRD_PARTY_DLMALLOC_A).pkg:					\
 		$(THIRD_PARTY_DLMALLOC_A_OBJS)			\
 		$(foreach x,$(THIRD_PARTY_DLMALLOC_A_DIRECTDEPS),$($(x)_A).pkg)
 
-$(THIRD_PARTY_DLMALLOC_A_OBJS):					\
+# we can't use address sanitizer because:
+#   address sanitizer depends on dlmalloc
+o/$(MODE)/third_party/dlmalloc/dlmalloc.o:			\
 		OVERRIDE_CFLAGS +=				\
-			$(NO_MAGIC)				\
 			-ffreestanding				\
+			-fno-sanitize=address
+
+# we must segregate codegen because:
+#   file contains multiple independently linkable apis
+o/$(MODE)/third_party/dlmalloc/dlmalloc.greg.o:			\
+		OVERRIDE_CFLAGS +=				\
 			-ffunction-sections			\
 			-fdata-sections