This option is a blanket for all the DTrace-related software. The option
when enabled passes in -fsanitize=address -fsanitize=undeifned, enabling
ASAN and UBSAN in the following components:
- libdtrace
- dtrace(1)
- lockstat(1)
- plockstat(1)
The option defaults to "no" and is intended as a developer aid.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D41157