- update to 1.53:
* Fixing set_multi() so that if the server closes the connection
it will no longer raise AttributeError. Issue found and resolution
reviewed by Ben Hoyt.
* readline() now will mark the connection dead if the read fails.
It was just closing it before. This is related to the set_multi()
change but worth noting separately. Thanks to Ben Hoyt.
* Changing check_keys to use re.match() instead of str.translate(),
because re.match() works with Python < 2.6.
Found by Giovanni Di Milia. (forwarded request 180692 from dirkmueller)