minor formatting change

HACKING.md

@@ -6,7 +6,7 @@ Tasks that I've got in mind at the moment:
 
 I've started implementing IPv6 support in the backend of tollgate in a seperate branch.  At the moment it's got some basic backend support but I haven't implemented the frontend code just yet (or the scanning module for ipv6).  There's some stuff to consider though:
 
-* **Done, implemented in IPv4** <strikeout>`-t nat -j REDIRECT` doesn't work in ip6tables at all.  They have `-t mangle -j TPROXY` instead, which requires setting some "interesting" socket options (ie: I don't think Apache will work any more for the first stage of the captivity landing.</strikeout>
+* **Done, implemented in IPv4** `-t nat -j REDIRECT` doesn't work in ip6tables at all.  They have `-t mangle -j TPROXY` instead, which requires setting some "interesting" socket options (ie: I don't think Apache will work any more for the first stage of the captivity landing.
 * IPv6 privacy extensions will mean you have a lot of constantly changing IPs.  We can handle this pretty easily though (at least for the outgoing connections) by having a browser window open that updates the IP address periodically (treating it similar to an IPv4 change).
 * Incoming connections I want to have a flag on to say whether a host may be accessible from the outside world, defaulting to no.  As part of this getting the "permanent" IPv6 RA address may be important.  This can be done by a multicasted ping for most operating systems, or sniffing router advertisements.