docs: Update documentation for stderr (now log) tracing backend.
This fixes commit ed7f5f1d8db06fc31352a5ef4f54985e630c575a. Signed-off-by: Richard W.M. Jones. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1458507614-32470-1-git-send-email-rjones@redhat.com Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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				| @ -157,9 +157,9 @@ performance penalty. | ||||
| Note that regardless of the selected trace backend, events with the "disable" | ||||
| property will be generated with the "nop" backend. | ||||
| 
 | ||||
| === Stderr === | ||||
| === Log === | ||||
| 
 | ||||
| The "stderr" backend sends trace events directly to standard error.  This | ||||
| The "log" backend sends trace events directly to standard error.  This | ||||
| effectively turns trace events into debug printfs. | ||||
| 
 | ||||
| This is the simplest backend and can be used together with existing code that | ||||
|  | ||||
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