Log Message:
memcached: updated to 1.6.20

Memcached 1.6.20

Overview

Lots of fixes and updates for Proxy mode. Optimization for extstore disk \ 
flushing to alleviate excess evictions. Changes to meta protocol and smaller \ 
fixes.

Fixes

extstore: increase aggressiveness of flush thread
proxy: improve unit test coverage
proxy: random small fixes
proxy: return 'readvalidate' on be read timeout
proxy: don't print null ustats from "stats proxy"
proxy: use connect timeout during retries
proxy: fix flaky test in proxyconfig.t
Add a debian dockerfile, as well as upgrade the autoconf dependency
check for sys/auxv.h
proxy: send CLIENT_ERROR when proper
proxy: print lua error message on reload failure
proxy: rip out io_uring code (to be re-added later)
proxy: overhaul backend error handling: surface error messages to clients
proxy: fix reversal of pipelined backend queries
proxy: add request and buffer memory limits
proxy: restrict functions for lua config vs route
proxy: fix bug ignoring -R setting for proxy reqs
proxy: add conntimeout error

New Features

proxy: add memory accounting tracking