revert dup isEnabled and document real isEnabled

docs/Lua API.rst

@@ -3596,6 +3596,13 @@ to lua contexts. They are automatically imported by
 ``mkmodule('plugins.<name>')``; this means that a lua
 module file is still necessary for ``require`` to read.
 
+In addition to any native functions documented here, plugins that can be
+disabled (that is, plugins that support the enable/disable API) will have the
+following functions defined:
+
+* ``isEnabled()`` returns whether the plugin is enabled.
+* ``setEnabled(boolean)`` sets whether the plugin is enabled.
+
 The following plugins have lua support.
 
 blueprint
@@ -3616,9 +3623,8 @@ buildingplan
 
 Native functions:
 
-* ``bool isEnabled()`` returns whether the plugin is enabled.
-* ``bool isPlannableBuilding(df::building_type type)`` returns whether the building type is handled by buildingplan.
-* ``void addPlannedBuilding(df::building *bld)`` suspends the building jobs and adds the building to the monitor list.
+* ``bool isPlannableBuilding(df::building_type type)`` returns whether the building type is handled by buildingplan
+* ``void addPlannedBuilding(df::building *bld)`` suspends the building jobs and adds the building to the monitor list
 * ``void doCycle()`` runs a check for whether buildlings in the monitor list can be assigned items and unsuspended. This method runs automatically twice a game day, so you only need to call it directly if you want buildingplan to do a check right now.
 
 burrows

plugins/buildingplan.cpp

@@ -418,10 +418,6 @@ DFhackCExport command_result plugin_onstatechange(color_ostream &out, state_chan
 
 // Lua API section
 
-static bool isEnabled() {
-    return is_enabled;
-}
-
 static bool isPlannableBuilding(df::building_type type) {
     return planner.isPlanableBuilding(type);
 }
@@ -435,7 +431,6 @@ static void doCycle() {
 }
 
 DFHACK_PLUGIN_LUA_FUNCTIONS {
-    DFHACK_LUA_FUNCTION(isEnabled),
     DFHACK_LUA_FUNCTION(isPlannableBuilding),
     DFHACK_LUA_FUNCTION(addPlannedBuilding),
     DFHACK_LUA_FUNCTION(doCycle),

plugins/lua/buildingplan.lua

@@ -4,7 +4,6 @@ local _ENV = mkmodule('plugins.buildingplan')
 
  Native functions:
 
- * bool isEnabled()
  * bool isPlannableBuilding(df::building_type type)
  * void addPlannedBuilding(df::building *bld)
  * void doCycle()