Modify for a new data structure in redis
Return http status 404 for files marked deleted on redis but not deleted on disk
Update pcre to version 8.35.
Update lua-resty-redis to version v0.20.
Revert "Start nginx then exec bash for debug."

This reverts commit 4c4966cf33412f6ede6ae635d4e110f06e95ee92.
Update LuaJIT to version 2.0.3