remove_warning in db.c
Merge pull request #2209 from charsyam/feature/remove_warning

remove_warning in db.c
Lua cmsgpack lib updated to latest version.

It fixes a bad bug that crashes the server in certain conditions
as shown in issue #2210.
Merge branch 'unstable' of github.com:/antirez/redis into unstable
Add symlink to redis-sentinel during make install