Log Message:
memcached: updated to 1.5.4

1.5.4:
New external storage (flash) shim. Still experimental and a little hard to tune, \ 
but generally stable and well tested.

Fixes
* make -I argument less position dependent
* external storage base commit
* lru_crawler metadump output ends with "END\r\n"
* fix: -o no_lru_crawler didn't work

New Features
extstore, a cleverly named external storage shim, is an addon for using flash \ 
drives to expand cache storage.