Experimental support for "detach on execve" feature

* strace.c: Define new detach_on_execve, skip_startup_execve bool variables.
(init): Set detach_on_execve on -b, set skip_startup_execve if
"strace PROG" form is used.
(trace): Detach from process if -b and we see PTRACE_EVENT_EXEC event.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
1 file changed