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resolv.conf.5: srcfix: rewrap source lines
No content changes Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -168,7 +168,8 @@ The value for this option is silently capped to 15.
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.\" Since glibc 2.2
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.\" Since glibc 2.2
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Sets the amount of time the resolver will wait for a
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Sets the amount of time the resolver will wait for a
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response from a remote name server before retrying the
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response from a remote name server before retrying the
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query via a different name server. This may
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query via a different name server.
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This may
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.BR not
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.BR not
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be the total time taken by any resolver API call and there is no
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be the total time taken by any resolver API call and there is no
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guarantee that a single resolver API call maps to a single timeout.
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guarantee that a single resolver API call maps to a single timeout.
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@ -325,23 +326,26 @@ Sets
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.BR RES_TRUSTAD
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.BR RES_TRUSTAD
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in
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in
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.IR _res.options .
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.IR _res.options .
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This option controls the AD bit behavior of the stub resolver. If a
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This option controls the AD bit behavior of the stub resolver.
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validating resolver sets the AD bit in a response, it indicates that
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If a validating resolver sets the AD bit in a response,
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the data in the response was verified according to the DNSSEC
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it indicates that the data in the response was verified according
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protocol. In order to rely on the AD bit, the local system has to
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to the DNSSEC protocol.
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In order to rely on the AD bit, the local system has to
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trust both the DNSSEC-validating resolver and the network path to it,
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trust both the DNSSEC-validating resolver and the network path to it,
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which is why an explicit opt-in is required. If the
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which is why an explicit opt-in is required.
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If the
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.B trust\-ad
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.B trust\-ad
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option is active, the stub resolver sets the AD bit in outgoing DNS
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option is active, the stub resolver sets the AD bit in outgoing DNS
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queries (to enable AD bit support), and preserves the AD bit in
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queries (to enable AD bit support), and preserves the AD bit in responses.
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responses. Without this option, the AD bit is not set in queries, and
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Without this option, the AD bit is not set in queries,
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it is always removed from responses before they are returned to the
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and it is always removed from responses before they are returned to the
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application. This means that applications can trust the AD bit in
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application.
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responses if the
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This means that applications can trust the AD bit in responses if the
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.B trust\-ad
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.B trust\-ad
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option has been set correctly. In glibc version 2.30 and earlier, the
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option has been set correctly.
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AD is not set automatically in queries, and passed through unchanged
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In glibc version 2.30 and earlier,
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to applications in responses.
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the AD is not set automatically in queries,
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and passed through unchanged to applications in responses.
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.RE
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.RE
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.PP
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.PP
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The \fIsearch\fP keyword of a system's \fIresolv.conf\fP file can be
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The \fIsearch\fP keyword of a system's \fIresolv.conf\fP file can be
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