Added comment explaining `now'.
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@ -30,6 +30,6 @@ void tm_start(timer *, unsigned after);
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void tm_stop(timer *);
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void tm_stop(timer *);
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void tm_dump_all(void);
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void tm_dump_all(void);
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extern bird_clock_t now;
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extern bird_clock_t now; /* Time in seconds since unknown epoch */
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#endif
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#endif
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