Fixes the cross comms exemption of the current server. (#60951)

Added a lowercase variable to string, string lists and keyed list configs.
Currently lowercase is only TRUE for keyed lists because they have been working like that since 2018. It might be changed to be FALSE by default but it'll take a while looking at the parsed logs for the config entries.

code/controllers/configuration/config_entry.dm

@@ -96,6 +96,8 @@
 	default = ""
 	abstract_type = /datum/config_entry/string
 	var/auto_trim = TRUE
+	/// whether the string will be lowercased on ValidateAndSet or not.
+	var/lowercase = FALSE
 
 /datum/config_entry/string/vv_edit_var(var_name, var_value)
 	return var_name != NAMEOF(src, auto_trim) && ..()
@@ -104,6 +106,8 @@
 	if(!VASProcCallGuard(str_val))
 		return FALSE
 	config_entry_value = auto_trim ? trim(str_val) : str_val
+	if(lowercase)
+		config_entry_value = lowertext(config_entry_value)
 	return TRUE
 
 /datum/config_entry/number
@@ -143,13 +147,15 @@
 	abstract_type = /datum/config_entry/str_list
 	default = list()
 	dupes_allowed = TRUE
+	/// whether the string elements will be lowercased on ValidateAndSet or not.
+	var/lowercase = FALSE
 
 /datum/config_entry/str_list/ValidateAndSet(str_val)
 	if (!VASProcCallGuard(str_val))
 		return FALSE
 	str_val = trim(str_val)
 	if (str_val != "")
-		config_entry_value += str_val
+		config_entry_value += lowercase ? lowertext(str_val) : str_val
 	return TRUE
 
 /datum/config_entry/number_list
@@ -180,6 +186,8 @@
 	var/key_mode
 	var/value_mode
 	var/splitter = " "
+	/// whether the key names will be lowercased on ValidateAndSet or not.
+	var/lowercase_key = TRUE
 
 /datum/config_entry/keyed_list/New()
 	. = ..()
@@ -196,7 +204,9 @@
 	var/key_value = null
 
 	if(key_pos || value_mode == VALUE_MODE_FLAG)
-		key_name = lowertext(copytext(str_val, 1, key_pos))
+		key_name = copytext(str_val, 1, key_pos)
+		if(lowercase_key)
+			key_name = lowertext(key_name)
 		if(key_pos)
 			key_value = copytext(str_val, key_pos + length(str_val[key_pos]))
 		var/new_key

code/controllers/configuration/entries/comms.dm

@@ -8,6 +8,7 @@
 	key_mode = KEY_MODE_TEXT
 	value_mode = VALUE_MODE_TEXT
 	protection = CONFIG_ENTRY_LOCKED
+	lowercase_key = FALSE // The names of the servers are proper nouns. Also required for the cross_comms_name config to work.
 
 /datum/config_entry/keyed_list/cross_server/ValidateAndSet(str_val)
 	. = ..()