Merge pull request #15652 from SandPoot/title-screen

Updates the title screen

code/__HELPERS/clients.dm

@@ -0,0 +1,12 @@
+///Returns whether or not a player is a guest using their ckey as an input
+/proc/is_guest_key(key)
+	if(findtext(key, "Guest-", 1, 7) != 1) //was findtextEx
+		return FALSE
+
+	var/i, ch, len = length(key)
+
+	for(i = 7, i <= len, ++i) //we know the first 6 chars are Guest-
+		ch = text2ascii(key, i)
+		if (ch < 48 || ch > 57) //0-9
+			return FALSE
+	return TRUE