Add config option to disable same-CID popup "YOU'LL BE BANNED STOP IT"

This is seriously fucking annoying when testing local changes. Only a
config option instead of being removed completely because I am actually
going to go fucking insane without this being gone.

code/controllers/configuration.dm

@@ -173,6 +173,7 @@
 	var/dsay_allowed = 1
 
 	var/disable_lobby_music = 0 // Disables the lobby music
+	var/disable_cid_warn_popup = 0 //disables the annoying "You have already logged in this round, disconnect or be banned" popup, because it annoys the shit out of me when testing.
 
 /datum/configuration/New()
 	var/list/L = subtypesof(/datum/game_mode)
@@ -549,6 +550,9 @@
 				if("disable_lobby_music")
 					config.disable_lobby_music = 1
 
+				if("disable_cid_warn_popup")
+					config.disable_cid_warn_popup = 1
+
 				else
 					diary << "Unknown setting in configuration: '[name]'"
 

code/modules/mob/login.dm

@@ -14,7 +14,8 @@
 				if( (M.computer_id == client.computer_id) )
 					if(matches)	matches += " and "
 					matches += "ID ([client.computer_id])"
-					spawn() alert("You have logged in already with another key this round, please log out of this one NOW or risk being banned!")
+					if(!config.disable_cid_warn_popup)
+						spawn() alert("You have logged in already with another key this round, please log out of this one NOW or risk being banned!")
 				if(matches)
 					if(M.client)
 						message_admins("<font color='red'><B>Notice: </B><font color='blue'><A href='?src=\ref[usr];priv_msg=\ref[src]'>[key_name_admin(src)]</A> has the same [matches] as <A href='?src=\ref[usr];priv_msg=\ref[M]'>[key_name_admin(M)]</A>.</font>", 1)

config/example/config.txt

@@ -311,4 +311,7 @@ PLAYER_REROUTE_CAP 0
 #DISABLE_DSAY
 
 ## Uncomment this if you want to disable the lobby music
-#DISABLE_LOBBY_MUSIC
+#DISABLE_LOBBY_MUSIC
+
+## Uncomment this if you want to disable the popup alert for people on the same CID
+#DISABLE_CID_WARN_POPUP