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diff --git a/share/man/man5/resolver.5 b/share/man/man5/resolver.5
--- a/share/man/man5/resolver.5
+++ b/share/man/man5/resolver.5
@@ -25,7 +25,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.Dd November 23, 2022
+.Dd March 15, 2026
.Dt RESOLVER 5
.Os
.Sh NAME
@@ -170,6 +170,38 @@
.Dv RES_MAXRETRY
(see
.In resolv.h ) .
+.It Sy edns0
+Sets
+.Dv RES_USE_EDNS0 .
+Attach an OPT pseudo-RR for the EDNS0 extension,
+as specified in RFC 2671.
+This allows the resolver to advertise a larger UDP receive buffer size,
+permitting responses larger than the original 512-byte limit.
+.It Sy inet6
+Sets
+.Dv RES_USE_INET6 .
+Causes
+.Xr gethostbyname 3
+to look up AAAA records before A records
+and to map IPv4 responses into IPv6 addresses.
+The use of this option is discouraged.
+.It Sy insecure1
+Sets
+.Dv RES_INSECURE1 .
+Disables the check that the response was received from the
+same server to which the query was sent.
+Use of this option is a security risk and is not recommended.
+.It Sy insecure2
+Sets
+.Dv RES_INSECURE2 .
+Disables the check that the response contains a query
+matching the one that was sent.
+Use of this option is a security risk and is not recommended.
+.It Sy no-check-names
+Sets
+.Dv RES_NOCHECKNAME .
+Disables the check of incoming host names for invalid characters
+such as underscore, non-ASCII, or control characters.
.It Sy no_tld_query
tells the resolver not to attempt to resolve a top level domain name, that
is, a name that contains no dots.
@@ -179,6 +211,12 @@
and
.Sy search
rules with the given name.
+.It Sy rotate
+Sets
+.Dv RES_ROTATE .
+Causes the resolver to round-robin among the configured name servers,
+distributing the query load instead of always trying the first
+listed server.
.It Sy reload-period : Ns Ar n
The resolver checks the modification time of
.Pa /etc/resolv.conf

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