libmemcached

Fixed the support for DTrace so that it also builds on Mac OSX

Fix for test case to not leak memory.

Merge

Import new purge work from trond

Test for a working SO_SNDTIMEO and SO_RCVTIMEO during configure

Run the async tests on the binary protocol as well

Disable user_supplied_bug17 on Solaris value_fetch use iscntrl while it is parsing the key, and this always fails on my systems. I don't know the language of the text, but I have tried running the test in zh_CN.UTF-8 and en_US.UTF-8 without success.

Fix test case for weighted servers.

Refactor to remove leak in new framework for clone() of server.

Refactor for host_reset, updated test. TODO in code can be safetly ignored under current code (since no malloc is required).