Server Changes
==============

1. Now, default binary logging is ENABLED, and, corresponding variables
   are set as follows:
   log_bin= ON
   log_bin_basename= {datadir}/binlog.xxxxxx
   log_bin_index= {datadir}/binlog.index

2. On setting --log-bin option without string or empty string, binary
   logging is ENABLED, and, corresponding variables are set as follows:
   log_bin= ON
   log_bin_basename= {datadir}/binlog.xxxxxx
   log_bin_index= {datadir}/binlog.index.

3. The default value of server-id is changed to 1.

4. The default relay log file names are {datadir}/relaylog.xxxxxx.

5. The default relay log index file name is relaylog.index.

6. Server is not allowed to start when binary and relay logs have same
   base name. Either using --log-bin and --relay-log with same non-empty
   parameter, using --log-bin=relaylog or --relaylog=binlog.

7. If --log-bin option is specified without specifying a --server-id,
   then server is now allowed to initialize with a warning.

8. If server is started with --skip-log-bin --log-bin, the binary
   logging is ENABLED, and, corresponding variables are now set properly
   as follows:
   log_bin= ON
   log_bin_basename= {datadir}/binlog.xxxxxx
   log_bin_index= {datadir}/binlog.index.

Following existing behaviors (9,10,11) are not changed and must work as
earlier:

9. Binary logging remains disabled on --initialize[-insecure] by
   default.

10. --log-bin=anyuserprovidedname
    If a user provides string to --log-bin option, then binary logging
    is ENABLED using {datadir}/anyuserprovidedname.xxxxxx.

11. --skip-log-bin, --disable-log-bin
    If a user provides --skip-log-bin or --disable-log-bin, then binary
    logging is DISABLED.