rustg for UDP shipping (#7897)

The C++ UDP logging library has been swapped out with a rustg implementation. The rustg library uses non-blocking IO mode, and hopefully has less trouble than the C++ one. Though we'll have to see. It should error when the call is supposed to block.

The old library has been removed.

code/modules/udp/ship_udp.dm

@@ -24,72 +24,67 @@
 	|                                   |
 	@===================================@
 
-	You can easily send UDP Data via the UDPSHipper.dll
+	The prerequisite for using this is rustg compiled with the udp_shipper feature.
 
-	Simply use the call() function to call the udp shipper DLL and enter your details!
-
-	The first bit of code needed will always be the same, You will never have to touch this, Copy-pasta all you like:
-
-			call("UDPShipper.dll", "send_udp_data")
-
-	Well thats the first part, the harder part is to input the details into DLL. Lets do that now! The syntax to add arguments to the post request is:
-
-			call("UDPShipper.dll", "send_udp_data")(DestinationIP, DestinationPort, Data)
-
-	DLL Written by Arrow768
+	Rustg's rustg_udp_shipper_send function is used to send data.
 */
 
-/*
- * A generic proc for sending udp request with the aforementioned .DLL files.
- * Expected arg structure:
- * 1st arg			- the destination ip
- * 2nd arg			- the destination port
- * 3rd arg			- The Data to send
- *
- * @return int		- Error code
- * -1 indicates proc or library failure.
+/**
+ * Sends data via UDP.
  *
+ * addr must be formatted as "ip:port".
+ * data must be a string to be sent.
  */
-/proc/send_udp_data()
-    if (args.len < 3)
-        return -1
+/proc/send_udp_data(addr, data)
+#ifdef RUST_G
+#	ifndef rustg_udp_shipper_send
+#		error rustg_udp_shipper_send macro is not defined for rustg.
+#	endif // rustg_udp_shipper_send
 
-    var/result = call("UDPShipper.dll", "send_udp_data")(arglist(args))
+	if (!addr || !data)
+		return "Not enough args."
 
-    return result
+	. = rustg_udp_shipper_send(addr, data)
+
+	if (.)
+		error("UDP Shipper error: [.]")
+
+#else
+	return
+#endif // RUST_G
 
 /proc/send_gelf_log(short_message="", long_message="", level = 5, category="", additional_data=list())
-    if (!config)
-        return 100
-    if (!config.log_gelf_enabled)
-        return 101
-    var/list/log_data = list()
-    log_data["version"] = "1.1"
-    log_data["host"] = world.name
-    log_data["short_message"] = html_encode(short_message)
-    log_data["long_message"] = html_encode(long_message)
-    log_data["level"] = level
-    log_data["_category"] = category
-    log_data["_game_id"] = game_id
+	if (!config)
+		return "Configuration not loaded."
+	if (!config.log_gelf_enabled)
+		return "Gelf logging not enabled."
+	var/list/log_data = list()
+	log_data["version"] = "1.1"
+	log_data["host"] = world.name
+	log_data["short_message"] = html_encode(short_message)
+	log_data["long_message"] = html_encode(long_message)
+	log_data["level"] = level
+	log_data["_category"] = category
+	log_data["_game_id"] = game_id
 
-    log_data.Add(additional_data)
-    var/gelf_log = json_encode(log_data)
-    return send_udp_data(config.log_gelf_ip,config.log_gelf_port,gelf_log)
+	log_data.Add(additional_data)
+	var/gelf_log = json_encode(log_data)
+	return send_udp_data(config.log_gelf_addr, gelf_log)
 
 /obj/item/device/udp_debugger
-    name = "udp_debugger"
-    desc = "Used to debug UDP Data sent to the log server."
-    icon = 'icons/obj/hacktool.dmi'
-    icon_state = "hacktool-g"
-    force = 5.0
-    w_class = 2.0
-    throwforce = 5.0
-    throw_range = 15
-    throw_speed = 3
-    desc = "You can use this to debug sending udp logs to the log server"
+	name = "udp_debugger"
+	desc = "Used to debug UDP Data sent to the log server."
+	icon = 'icons/obj/hacktool.dmi'
+	icon_state = "hacktool-g"
+	force = 5.0
+	w_class = 2.0
+	throwforce = 5.0
+	throw_range = 15
+	throw_speed = 3
+	desc = "You can use this to debug sending udp logs to the log server"
 
-/obj/item/device/udp_debugger/proc/raw(ip=config.log_gelf_ip,port=config.log_gelf_port,data="RAW Test String")
-    return send_udp_data(ip,port,data)
+/obj/item/device/udp_debugger/proc/raw(addr=config.log_gelf_addr, data="RAW Test String")
+	return send_udp_data(addr,data)
 
 /obj/item/device/udp_debugger/proc/gelf(short_message="", long_message="", level = 1)
-    return send_gelf_log(short_message, long_message, level)
+	return send_gelf_log(short_message, long_message, level)