Update binding.py

Updated the comment to specify this works in synchronous/blocking way

Author: ashah-splunk

splunklib/binding.py

@@ -456,7 +456,8 @@ class Context(object):
     :param headers: List of extra HTTP headers to send (optional).
     :type headers: ``list`` of 2-tuples.
     :param retires: Number of retries for each HTTP connection (optional, the default is 0).
-                    NOTE THAT THIS MAY INCREASE THE NUMBER OF ROUND TRIP CONNECTIONS TO THE SPLUNK SERVER.
+                    NOTE THAT THIS MAY INCREASE THE NUMBER OF ROUND TRIP CONNECTIONS TO THE SPLUNK SERVER AND BLOCK THE
+                    CURRENT THREAD WHILE RETRYING.
     :type retries: ``int``
     :param retryDelay: How long to wait between connection attempts if `retries` > 0 (optional, defaults to 10s).
     :type retryDelay: ``int`` (in seconds)