Issue #1597788 by markpavlitski, clarify memcache_admin documentation.
Issue 1613622 by Jeremy, markpavlitski, tzakrajs: properly hash keys >250 characters
Issue #1974088 by Jeremy, erikwebb: document memcache lock implementation and stampede protection; documentation cleanup.
Issue #1472332 by Jeremy, markpavlitski: better explain Binary protocol and TCP_NODELAY
Issue #1785744 by markpavlitski, quicksketch: initialize user timezone in memcache-session.inc
Issue #282446 by mikeytown2, peter bowey: fix PHP notice in in sess_user_load()
Issue #1633948 by alanmackenzie: Add configuration link on admin module page.
Issue #1150042 by markpavlitski, fix statistics for default cluster
Issue #1830496 by markpavlitski: log connect errors in watchdog.