[Mesh] Unique SSIDs

We finally have unique SSIDs for the nodes. Instead of them all being named "peoplesopen.net" they will now have the last three parts of the IPv4 address added to the name. E.g. for a home node with the IP 100.64.2.1 the SSIDs will be: 2.4 Ghz: "peoplesopen.net 64.2.1" 5 GHZ: "peoplesopen.net fast 64.2.1" An extender node with the IP 100.64.2.2 will have the SSID "peoplesopen.net 64.2.2" even if it is a 5 GHz node. Extender nodes always only have one radio, so this is fine. This only applies to home nodes configured after this change and extender nodes flashed with the latest (not yet downloadable) build. I moved builds.sudomesh.org to be hosted on the VPS running the peoplesopen.net website and will grant Grant access as soon as I have his SSH key so he can upload the latest builds. We should later upgrade this to map the scary numbers to either nice simple english language words (or why limit to english? give an option of spanish) or emojis. For those of you who are not read up on this issue, the nodes need to have unique SSIDs because they we do not have layer 3 roaming working, so when a client device is connected to a node's "peoplesopen.net" wifi network and auto-roams to a different node's wifi network also called "peoplesopen.net" then it will suddenly be on a new subnet but it will not ask for a new DHCP lease, since clients assume that multiple access points with the same name are on the same layer 2 networs / subnet. The result is that people who are sitting approximately between two mesh nodes will have their internet intermittently stop working for minutes at a time. -- marc/juul