4 - UDP, disabled by default from memcached-1.5.6
5 soft (maybe only discourage in docs)
7 - memcached_delete(): expires param is obsolete
9 - Rename all headers with a standard name like `string.h` and `limits.h`.
13 - Write a shell application (?)
14 - Fix version in command line tools
15 - Write (more) test cases for all command line tools (!!!)
16 - Write some sort of "default" options bit for tools
17 - More examples using libraries
19 - implement more connection/hash algo
20 - implement compression
21 - Revisit get() code (look for performance enhancements)
22 - Add support for managing servers for clusters.
23 - Build embedded version