Merge InnoDB 5.7 from mysql-5.7.9.

Contains also

MDEV-10547: Test multi_update_innodb fails with InnoDB 5.7

	The failure happened because 5.7 has changed the signature of
	the bool handler::primary_key_is_clustered() const
	virtual function ("const" was added). InnoDB was using the old
	signature which caused the function not to be used.

MDEV-10550: Parallel replication lock waits/deadlock handling does not work with InnoDB 5.7

	Fixed mutexing problem on lock_trx_handle_wait. Note that
	rpl_parallel and rpl_optimistic_parallel tests still
	fail.

MDEV-10156 : Group commit tests fail on 10.2 InnoDB (branch bb-10.2-jan)
  Reason: incorrect merge

MDEV-10550: Parallel replication can't sync with master in InnoDB 5.7 (branch bb-10.2-jan)
  Reason: incorrect merge

storage/innobase/log/log0crypt.cc

@@ -197,14 +197,14 @@ log_blocks_crypt(
 		block can't be encrypted. */
 		if (info == NULL ||
 		    info->key_version == UNENCRYPTED_KEY_VER ||
-			(log_block_checksum_is_ok_or_old_format(log_block, false) &&
+			(log_block_checksum_is_ok(log_block, false) &&
 			 what == ENCRYPTION_FLAG_DECRYPT)) {
 			memcpy(dst_block, log_block, OS_FILE_LOG_BLOCK_SIZE);
 			goto next;
 		}
 
-		ut_ad(what == ENCRYPTION_FLAG_DECRYPT ? !log_block_checksum_is_ok_or_old_format(log_block, false) :
-			log_block_checksum_is_ok_or_old_format(log_block, false));
+		ut_ad(what == ENCRYPTION_FLAG_DECRYPT ? !log_block_checksum_is_ok(log_block, false) :
+			log_block_checksum_is_ok(log_block, false));
 
 		// Assume log block header is not encrypted
 		memcpy(dst_block, log_block, LOG_BLOCK_HDR_SIZE);
@@ -260,11 +260,13 @@ init_crypt_key(
 	rc = encryption_key_get(LOG_DEFAULT_ENCRYPTION_KEY, info->key_version, mysqld_key, &keylen);
 
 	if (rc) {
-		ib_logf(IB_LOG_LEVEL_ERROR,
-			"Redo log crypto: getting mysqld crypto key "
-			"from key version failed err = %u. Reason could be that requested"
-			" key_version %u is not found or required encryption "
-			" key management is not found.", rc, info->key_version);
+		ib::error()
+			<< "Redo log crypto: getting mysqld crypto key "
+			<< "from key version failed err = " << rc
+			<< " Reason could be that requested key_version "
+			<< info->key_version
+			<< "is not found or required encryption "
+			<< " key management is not found.";
 		return false;
 	}
 
@@ -372,18 +374,18 @@ log_crypt_set_ver_and_key(
 		memset(info.crypt_nonce, 0, sizeof(info.crypt_nonce));
 	} else {
 		if (my_random_bytes(info.crypt_msg, MY_AES_BLOCK_SIZE) != MY_AES_OK) {
-			ib_logf(IB_LOG_LEVEL_ERROR,
-				"Redo log crypto: generate "
-				"%u-byte random number as crypto msg failed.",
-				MY_AES_BLOCK_SIZE);
+			ib::error()
+				<< "Redo log crypto: generate "
+				<< MY_AES_BLOCK_SIZE
+				<< "-byte random number as crypto msg failed.";
 			ut_error;
 		}
 
 		if (my_random_bytes(info.crypt_nonce, MY_AES_BLOCK_SIZE) != MY_AES_OK) {
-			ib_logf(IB_LOG_LEVEL_ERROR,
-				"Redo log crypto: generate "
-				"%u-byte random number as AES_CTR nonce failed.",
-				MY_AES_BLOCK_SIZE);
+			ib::error()
+				<< "Redo log crypto: generate "
+				<< MY_AES_BLOCK_SIZE
+				<< "-byte random number as AES_CTR nonce failed.";
 			ut_error;
 		}
 
@@ -619,19 +621,19 @@ log_crypt_print_error(
 {
 	switch(err_info) {
 	case LOG_CRYPT_KEY_NOT_FOUND:
-		ib_logf(IB_LOG_LEVEL_ERROR,
-			"Redo log crypto: getting mysqld crypto key "
-			"from key version failed. Reason could be that "
-			"requested key version is not found or required "
-			"encryption key management plugin is not found.");
+		ib::error()
+			<< "Redo log crypto: getting mysqld crypto key "
+			<< "from key version failed. Reason could be that "
+			<< "requested key version is not found or required "
+			<< "encryption key management plugin is not found.";
 		break;
 	case LOG_DECRYPT_MAYBE_FAILED:
-		ib_logf(IB_LOG_LEVEL_ERROR,
-			"Redo log crypto: failed to decrypt log block. "
-			"Reason could be that requested key version is "
-			"not found, required encryption key management "
-			"plugin is not found or configured encryption "
-			"algorithm and/or method does not match.");
+		ib::error()
+			<< "Redo log crypto: failed to decrypt log block. "
+			<< "Reason could be that requested key version is "
+			<< "not found, required encryption key management "
+			<< "plugin is not found or configured encryption "
+			<< "algorithm and/or method does not match.";
 		break;
 	default:
 		ut_error; /* Real bug */