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clarify that the CURLMOPT_TIMERFUNCTION callback can pass in 0 and -1 as legal
values and what they mean
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@ -47,10 +47,11 @@ changes. The timeout value is at what latest time the application should call
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one of the \&"performing" functions of the multi interface
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(\fIcurl_multi_socket(3)\fP, \fIcurl_multi_socket_all(3)\fP and
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\fIcurl_multi_perform(3)\fP) - to allow libcurl to keep timeouts and retries
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etc to work. Libcurl attempts to limit calling this only when the fixed future
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timeout time actually change. See also \fICURLMOPT_TIMERDATA\fP. This callback
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can be used instead of, or in addition to, \fIcurl_multi_timeout(3)\fP. (Added
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in 7.16.0)
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etc to work. A timeout value of -1 means that there is no timeout at all, and
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0 means that the timeout is already reached. Libcurl attempts to limit calling
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this only when the fixed future timeout time actually change. See also
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\fICURLMOPT_TIMERDATA\fP. This callback can be used instead of, or in addition
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to, \fIcurl_multi_timeout(3)\fP. (Added in 7.16.0)
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.IP CURLMOPT_TIMERDATA
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Pass a pointer to whatever you want passed to the
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\fBcurl_multi_timer_callback\fP's third argument, the userp pointer. This is
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