Fix typo in ra-param man page section.
diff --git a/man/dnsmasq.8 b/man/dnsmasq.8
index f01a5ba..9c30d2b 100644
--- a/man/dnsmasq.8
+++ b/man/dnsmasq.8
@@ -1829,7 +1829,7 @@
.B --ra-param=eth0,60.
The lifetime of the route may be changed or set to zero, which allows
a router to advertise prefixes but not a route via itself.
-.B --ra-parm=eth0,0,0
+.B --ra-param=eth0,0,0
(A value of zero for the interval means the default value.) All four parameters may be set at once.
.B --ra-param=eth0,mtu:1280,low,60,1200