Add blktrace and verify debug tracing

Also add "all" as a keyword for setting all values, and pretty up
the output a bit by justifying and aligning the output.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/fio.c b/fio.c
index 841b59a..04a06ba 100644
--- a/fio.c
+++ b/fio.c
@@ -60,8 +60,8 @@
 
 static inline void td_set_runstate(struct thread_data *td, int runstate)
 {
-	dprint(FD_PROCESS, "%d: runstate %d -> %d\n", td->pid, td->runstate,
-							runstate);
+	dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", td->pid, td->runstate,
+								runstate);
 	td->runstate = runstate;
 }