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This is modified version of memcached 1.2.8

### New functions: ###

tag_add <tag> <key> - adds tag for the key 
tag_delete <tag> - deletes all keys with given tag 
tags_delete <tag1> <tag2> ... - deletes keys which have set of all given tags 

### Dependencies: ###

* libevent, http://www.monkey.org/~provos/libevent/ (libevent-dev)

If you're using MacOS, you'll want libevent 1.1 or higher to deal with  a kqueue bug.

Also, be warned that the -k (mlockall) option to memcached might be
dangerous when using a large cache.  Just make sure the memcached machines
don't swap.  memcached does non-blocking network I/O, but not disk.  (it
should never go to disk, or you've lost the whole point of it)

The memcached website is at: http://memcached.org/