sctp: document sctp_recvmsg as implemented

PR:		275990
MFC after:	3 days

lib/libc/net/sctp_recvmsg.3

@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd February 2, 2024
+.Dd May 2, 2024
 .Dt SCTP_RECVMSG 3
 .Os
 .Sh NAME
@@ -40,8 +40,8 @@
 .In netinet/sctp.h
 .Ft ssize_t
 .Fo sctp_recvmsg
-.Fa "int s" "void *msg" "size_t len" "struct sockaddr * restrict from"
-.Fa "socklen_t * restrict fromlen" "struct sctp_sndrcvinfo *sinfo" "int *flags"
+.Fa "int s" "void *msg" "size_t len" "struct sockaddr *from"
+.Fa "socklen_t *fromlen" "struct sctp_sndrcvinfo *sinfo" "int *flags"
 .Fc
 .Ft ssize_t
 .Fo sctp_recvv