Add a timeout to prevent potentially indefinite blocking

ia-verify-file

@@ -17,7 +17,7 @@ if len(item) > 100 or item[0] not in (string.ascii_letters + string.digits) or i
 	sys.exit(1)
 
 # Fetch https://archive.org/metadata/ITEM to get the two servers that store the item
-conn = http.client.HTTPSConnection('archive.org')
+conn = http.client.HTTPSConnection('archive.org', timeout = 30)
 conn.request('GET', f'/metadata/{item}')
 r = conn.getresponse()
 if r.status != 200:
@@ -37,7 +37,7 @@ if len(o['workable_servers']) < 2:
 
 # Fetch _files.xml from each server and compare hash
 for server in o['workable_servers']:
-	conn = http.client.HTTPSConnection(server)
+	conn = http.client.HTTPSConnection(server, timeout = 30)
 	conn.request('GET', f'{o["dir"]}/{item}_files.xml')
 	r = conn.getresponse()
 	if r.status != 200: