Use custom User-Agent and send Accept* headers for better compatibility

botcmd.py

@@ -138,7 +138,14 @@ def handle_message(*, prefix, message, nick, channel, irc):
 
 		try:
 			try:
-				with urllib.request.urlopen(url, timeout = 5) as response:
+				headers = {
+					'User-Agent': 'Cockatric4 (like Lynx)',
+					'Accept': '*/*',
+					'Accept-Language': 'en,*;q=0.1',
+					'Accept-Charset': 'utf-8',
+				}
+				request = urllib.request.Request(url, headers = headers)
+				with urllib.request.urlopen(request, timeout = 5) as response:
 					if response.info().get_content_type() == 'text/html':
 						# First 4KiB of a page should be enough for any <title>
 						# Turns out it's not, so download 64KiB