MDEV-8264 encryption for binlog

* Start_encryption_log_event
* --encrypt-binlog command line option

based on google patches.

client/mysqlbinlog.cc

@@ -2575,6 +2575,11 @@ void *sql_alloc(size_t size)
   return alloc_root(&s_mem_root, size);
 }
 
+struct encryption_service_st encryption_handler=
+{
+  0, 0, 0, 0, 0, 0, 0
+};
+
 /*
   We must include this here as it's compiled with different options for
   the server

mysql-test/include/binlog_start_pos.inc

@@ -10,19 +10,19 @@
 #
 #   Format_description_log_event length = 
 #                      19 /* event common header */ +
-#                      57 /* misc stuff in the Format description header */ +
+#                      58 /* misc stuff in the Format description header */ +
 #                      number of events +
 #                      1 /* Checksum algorithm */ +
 #                      4 /* CRC32 length */
 # 
-# With current number of events = 163,
+# With current number of events = 164,
 #
-#   binlog_start_pos = 4 + 19 + 57 + 163 + 1 + 4 = 248.
+#   binlog_start_pos = 4 + 19 + 57 + 163 + 1 + 4 = 249.
 #
 ##############################################################################
 
-let $binlog_start_pos=248;
+let $binlog_start_pos=249;
 --disable_query_log
-SET @binlog_start_pos=248;
+SET @binlog_start_pos=249;
 --enable_query_log
 

mysql-test/include/show_binlog_events2.inc

@@ -4,7 +4,7 @@ if ($binlog_start)
 }
 if (!$binlog_start)
 {
-  --let $_binlog_start=248
+  --let $_binlog_start=249
 }
 if ($binlog_file)
 {

mysql-test/r/mysqld--help.result

@@ -176,6 +176,8 @@ The following options may be given as the first argument:
  --div-precision-increment=# 
  Precision of the result of '/' operator will be increased
  on that value
+ --encrypt-binlog    Encrypt binary logs (including relay logs)
+ (Defaults to on; use --skip-encrypt-binlog to disable.)
  --encrypt-tmp-disk-tables 
  Encrypt temporary on-disk tables (created as part of
  query execution)
@@ -1170,6 +1172,7 @@ delayed-insert-limit 100
 delayed-insert-timeout 300
 delayed-queue-size 1000
 div-precision-increment 4
+encrypt-binlog TRUE
 encrypt-tmp-disk-tables FALSE
 encrypt-tmp-files TRUE
 enforce-storage-engine (No default value)

mysql-test/suite/rpl/r/rpl_checksum.result

@@ -71,7 +71,7 @@ insert into t1 values (1) /* will not be applied on slave due to simulation */;
 set @@global.debug_dbug='d,simulate_slave_unaware_checksum';
 start slave;
 include/wait_for_slave_io_error.inc [errno=1236]
-Last_IO_Error = 'Got fatal error 1236 from master when reading data from binary log: 'Slave can not handle replication events with the checksum that master is configured to log; the first event 'master-bin.000009' at 367, the last event read from 'master-bin.000010' at 4, the last byte read from 'master-bin.000010' at 248.''
+Last_IO_Error = 'Got fatal error 1236 from master when reading data from binary log: 'Slave can not handle replication events with the checksum that master is configured to log; the first event 'master-bin.000009' at 368, the last event read from 'master-bin.000010' at 4, the last byte read from 'master-bin.000010' at 249.''
 select count(*) as zero from t1;
 zero
 0

mysql-test/suite/sys_vars/r/sysvars_server_embedded.result

@@ -695,6 +695,20 @@ NUMERIC_BLOCK_SIZE	1
 ENUM_VALUE_LIST	NULL
 READ_ONLY	NO
 COMMAND_LINE_ARGUMENT	REQUIRED
+VARIABLE_NAME	ENCRYPT_BINLOG
+SESSION_VALUE	NULL
+GLOBAL_VALUE	ON
+GLOBAL_VALUE_ORIGIN	COMPILE-TIME
+DEFAULT_VALUE	ON
+VARIABLE_SCOPE	GLOBAL
+VARIABLE_TYPE	BOOLEAN
+VARIABLE_COMMENT	Encrypt binary logs (including relay logs)
+NUMERIC_MIN_VALUE	NULL
+NUMERIC_MAX_VALUE	NULL
+NUMERIC_BLOCK_SIZE	NULL
+ENUM_VALUE_LIST	OFF,ON
+READ_ONLY	YES
+COMMAND_LINE_ARGUMENT	OPTIONAL
 VARIABLE_NAME	ENCRYPT_TMP_DISK_TABLES
 SESSION_VALUE	NULL
 GLOBAL_VALUE	OFF