Hard upstream sync (#6951)

* maps - none of our changes included yet i'll get them in after i finish up the rest of the sync

* sync part 1 - underscore folders in code

* controllers folder

* datums folder

* game folder

* cmon, work

* modules - admin to awaymissions

* cargo to events

* fields to lighting

* mapping > ruins

* rest of the code folder

* rest of the folders in the root directory

* DME

* fixes compiling errors. it compiles so it works

* readds map changes

* fixes dogborg module select

* fixes typo in moduleselect_alternate_icon filepath

code/__DEFINES/subsystems.dm

@@ -38,7 +38,7 @@
 //type and all subtypes should always call Initialize in New()
 #define INITIALIZE_IMMEDIATE(X) ##X/New(loc, ...){\
     ..();\
-    if(!initialized) {\
+    if(!(flags_1 & INITIALIZED_1)) {\
         args[1] = TRUE;\
         SSatoms.InitAtom(src, args);\
     }\