Fix embedded links: github instead of luci.subsignal.org

Fix links to point into Github repo instead of luci.subsignal.org
 - the hint to file a bug in dispatcher
 - footers of Bootstrap and Firefunk themes

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

modules/luci-base/luasrc/dispatcher.lua

@@ -317,7 +317,7 @@ function dispatch(request)
 		"Access Violation\nThe page at '" .. table.concat(request, "/") .. "/' " ..
 		"has no parent node so the access to this location has been denied.\n" ..
 		"This is a software bug, please report this message at " ..
-		"http://luci.subsignal.org/trac/newticket"
+		"https://github.com/openwrt/luci/issues"
 	)
 
 	if track.sysauth then

themes/luci-theme-bootstrap/luasrc/view/themes/bootstrap/footer.htm

@@ -14,7 +14,7 @@
 	local categories = disp.node_childs(tree)
 %>
    <footer>
-    <a href="http://luci.subsignal.org/">Powered by <%= ver.luciname %> (<%= ver.luciversion %>)</a> / <%= ver.distversion %>
+    <a href="https://github.com/openwrt/luci">Powered by <%= ver.luciname %> (<%= ver.luciversion %>)</a> / <%= ver.distversion %>
     <% if #categories > 1 then %>
      <ul class="breadcrumb pull-right" id="modemenu">
 	    <% for i, r in ipairs(categories) do %>

themes/luci-theme-freifunk-generic/luasrc/view/themes/freifunk-generic/footer.htm

@@ -19,7 +19,7 @@
 </div>
 
 <div class="footer">
-<p class="luci"><a href="http://luci.subsignal.org">Powered by <%= ver.luciname %> (<%= ver.luciversion %>)</a></p>
+<p class="luci"><a href="https://github.com/openwrt/luci">Powered by <%= ver.luciname %> (<%= ver.luciversion %>)</a></p>
 <% if xtime then %>
 <p class="exectime">Script execution time: <%=xtime%></p>
 <% end %>