fix BOSH connection with ejabberd. Fixes #5401

src/common/xmpp/transports_nb.py

@@ -707,7 +707,7 @@ def build_http_message(self, httpbody, method='POST'):
 			headers.append('Connection: Keep-Alive')
 		headers.append('\r\n')
 		headers = '\r\n'.join(headers)
-		return('%s%s\r\n' % (headers, httpbody))
+		return('%s%s' % (headers, httpbody))
 
 	def parse_http_message(self, message):
 		'''