delete debug log in pika_command.cc

ThreadModle done.
TODO redis response parser, redis command builder.

* Add area_block_size and max_write_buffer_number configs

* Config related commands can modify mutable options for storage engine

* feature: support hashtag in sharding mode

* feature: pkscanrange and pkrscanrange support hashtag in non classic
mode

* feature: rpoplpush support hashtag

bugfix: crc32 slot distribute algorithm error with non 2 power slot number

bugfix: can't sync binlog when exec redis command setnx and the key was exist.
when exec cmd setnx, if the key was exist, the value was not update by this cmd.
the binlog of this cmd will be saved into binlog file, but binlog length was zero. so can't do sync log.
so i fixed this issue, by writing binlog of setnx not judge from command return value.

Co-authored-by: Nminghao <minghao@jd.com>

Condition that slave master conn is broken, slave feel that broken and
send metasync msg again. Master feel that broken after receiving slave's
metasync msg. Instead of reject slave's metasync request, master should
notice slave keep trying send metasync because next time master may feel
that broken conn, remove old slave node and accept this new metasync msg.

Display "lag" of command "info replication" may overflow.

On condition consensus-level 0, updating slave binlog sync info may 
lead to coredump.