Enable the BSD crtbegin/crtend by default.

It has passed an exp run on amd64 and i386, and has testing on arm64. On
other architectures it is expected to run, however it can be disabled by
building world with -DWITHOUT_BSD_CRTBEGIN.

Sponsored by:	DARPA, AFRL

UPDATING

@@ -31,6 +31,11 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 13.x IS SLOW:
 	disable the most expensive debugging functionality run
 	"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20181123:
+	The BSD crtbegin and crtend code has been enabled by default. It has
+	had extensive testing on amd64, arm64, and i386. It can be disabled
+	by building a world with -DWITHOUT_BSD_CRTBEGIN.
+
 20181115:
 	The set of CTM commands (ctm, ctm_smail, ctm_rmail, ctm_dequeue)
 	has been converted to a port (misc/ctm) and will be removed from

share/mk/src.opts.mk

@@ -71,6 +71,7 @@ __DEFAULT_YES_OPTIONS = \
     BOOTPARAMD \
     BOOTPD \
     BSD_CPIO \
+    BSD_CRTBEGIN \
     BSDINSTALL \
     BSNMP \
     BZIP2 \
@@ -193,7 +194,6 @@ __DEFAULT_YES_OPTIONS = \
     ZONEINFO
 
 __DEFAULT_NO_OPTIONS = \
-    BSD_CRTBEGIN \
     BSD_GREP \
     CLANG_EXTRAS \
     DTRACE_TESTS \

sys/sys/param.h

@@ -60,7 +60,7 @@
  *		in the range 5 to 9.
  */
 #undef __FreeBSD_version
-#define __FreeBSD_version 1300003	/* Master, propagated to newvers */
+#define __FreeBSD_version 1300004	/* Master, propagated to newvers */
 
 /*
  * __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,