Actually allow what manual promises (setting IP on non-assigned signals)

advtrains/signals.lua

@@ -69,6 +69,8 @@ for r,f in pairs({on={as="off", ls="green", als="red"}, off={as="on", ls="red",
 				local sigd = advtrains.interlocking and advtrains.interlocking.db.get_sigd_for_signal(pos)
 				if sigd then
 					advtrains.interlocking.show_signalling_form(sigd, pname)
+				elseif advtrains.interlocking and player:get_player_control().aux1 then
+					advtrains.interlocking.show_ip_form(pos, pname)
 				elseif advtrains.check_turnout_signal_protection(pos, player:get_player_name()) then
 					advtrains.ndb.swap_node(pos, {name = "advtrains:retrosignal_"..f.as..rotation, param2 = node.param2}, true)
 				end
@@ -124,6 +126,8 @@ for r,f in pairs({on={as="off", ls="green", als="red"}, off={as="on", ls="red",
 				local sigd = advtrains.interlocking and advtrains.interlocking.db.get_sigd_for_signal(pos)
 				if sigd then
 					advtrains.interlocking.show_signalling_form(sigd, pname)
+				elseif advtrains.interlocking and player:get_player_control().aux1 then
+					advtrains.interlocking.show_ip_form(pos, pname)
 				elseif advtrains.check_turnout_signal_protection(pos, player:get_player_name()) then
 					advtrains.setstate(pos, f.als, node)
 				end
@@ -190,6 +194,8 @@ for r,f in pairs({on={as="off", ls="green", als="red"}, off={as="on", ls="red",
 				local sigd = advtrains.interlocking and advtrains.interlocking.db.get_sigd_for_signal(pos)
 				if sigd then
 					advtrains.interlocking.show_signalling_form(sigd, pname)
+				elseif advtrains.interlocking and player:get_player_control().aux1 then
+					advtrains.interlocking.show_ip_form(pos, pname)
 				elseif advtrains.check_turnout_signal_protection(pos, player:get_player_name()) then
 					advtrains.setstate(pos, f.als, node)
 				end

advtrains_interlocking/route_prog.lua

@@ -239,7 +239,7 @@ end
 local function do_advance_route(pname, rp, sigd, tsname)
 	table.insert(rp.route, {next = sigd, locks = rp.tmp_lcks})
 	rp.tmp_lcks = {}
-	chat(pname, "Added track section '"..tsname.."' to the route (revert with /at_rp_back)")
+	chat(pname, "Added track section '"..tsname.."' to the route.")
 end
 
 local function finishrpform(pname)

advtrains_interlocking/signal_api.lua

@@ -230,6 +230,9 @@ local players_assign_ip = {}
 -- shows small info form for signal IP state/assignment
 -- only_notset: show only if it is not set yet (used by signal tcb assignment)
 function advtrains.interlocking.show_ip_form(pos, pname, only_notset)
+	if not minetest.check_player_privs(pname, "interlocking") then
+		return
+	end
 	local form = "size[7,5]label[0.5,0.5;Signal at "..minetest.pos_to_string(pos).."]"
 	local pts, connid = advtrains.interlocking.db.get_ip_by_signalpos(pos)
 	if pts then

assets/interlocking.html.LyXconv/interlocking.html

@@ -320,7 +320,7 @@ should the driver (if even there is one) fail to recognize the instructions.
 behave as follows:
      <ul class="itemize1">
      <li class="itemize">Static signals and all red-green light signals from core advtrains that are not assigned to a TCB can be configured by
-     holding the &#8220;Sneak&#8221; key and then right-clicking the signal
+     holding the &#8220;Use&#8221; key and then right-clicking the signal
      </li>
      <li class="itemize">All signals that are assigned to a TCB can be configured by first right-clicking them, then selecting &#8220;Influence Point&#8221; in
      the signalling formspec.</li></ul>

assets/interlocking.lyx

@@ -692,7 +692,7 @@ Static signals and all red-green light signals from core advtrains that
 \begin_inset Quotes eld
 \end_inset
 
-Sneak
+Use
 \begin_inset Quotes erd
 \end_inset
 

assets/interlocking.lyx~

@@ -615,8 +615,8 @@ Interlocking patterns
 \end_layout
 
 \begin_layout Standard
-This section shows some examples on how you should set up track sections
- on certain track configurations.
+This section is supposed to show some examples on how you should set up
+ track sections on certain track configurations.
 \end_layout
 
 \begin_layout Section