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/modules/mob/dead/dead.dm

@@ -6,9 +6,9 @@ INITIALIZE_IMMEDIATE(/mob/dead)
 	sight = SEE_TURFS | SEE_MOBS | SEE_OBJS | SEE_SELF
 
 /mob/dead/Initialize()
-	if(initialized)
+	if(flags_1 & INITIALIZED_1)
 		stack_trace("Warning: [src]([type]) initialized multiple times!")
-	initialized = TRUE
+	flags_1 |= INITIALIZED_1
 	tag = "mob_[next_mob_id++]"
 	GLOB.mob_list += src