MDEV-10518: Large wsrep_gtid_domain_id may break IST

wsrep_gtid_domain_id was incorrectly being parsed and stored
as a signed long number on the joiner node.

mysql-test/suite/galera/r/mdev_10518.result

+# On node_1
+list of GTID variables :
+gtid_domain_id	1
+gtid_binlog_pos	
+gtid_binlog_state	
+gtid_current_pos	
+gtid_slave_pos	
+wsrep_gtid_domain_id	4294967295
+wsrep_gtid_mode	1
+# On node_2
+list of GTID variables :
+gtid_domain_id	2
+gtid_binlog_pos	
+gtid_binlog_state	
+gtid_current_pos	
+gtid_slave_pos	
+wsrep_gtid_domain_id	4294967295
+wsrep_gtid_mode	1
+# On node_1
+CREATE TABLE t1(i INT) ENGINE=INNODB;
+CREATE TABLE t2(i INT) ENGINE=MEMORY;
+INSERT INTO t1 VALUES(1);
+SELECT * FROM t1;
+i
+1
+SELECT * FROM t2;
+i
+list of GTID variables :
+gtid_domain_id	1
+gtid_binlog_pos	4294967295-1-3
+gtid_binlog_state	4294967295-1-3
+gtid_current_pos	4294967295-1-3
+gtid_slave_pos	
+wsrep_gtid_domain_id	4294967295
+wsrep_gtid_mode	1
+# On node_2
+SELECT * FROM t1;
+i
+1
+list of GTID variables :
+gtid_domain_id	2
+gtid_binlog_pos	4294967295-1-3
+gtid_binlog_state	4294967295-1-3
+gtid_current_pos	
+gtid_slave_pos	
+wsrep_gtid_domain_id	4294967295
+wsrep_gtid_mode	1
+# On node_1
+INSERT INTO t2 VALUES(1);
+SELECT * FROM t2;
+i
+1
+list of GTID variables :
+gtid_domain_id	1
+gtid_binlog_pos	1-1-1,4294967295-1-3
+gtid_binlog_state	1-1-1,4294967295-1-3
+gtid_current_pos	1-1-1,4294967295-1-3
+gtid_slave_pos	
+wsrep_gtid_domain_id	4294967295
+wsrep_gtid_mode	1
+# On node_2
+SELECT * FROM t2;
+i
+list of GTID variables :
+gtid_domain_id	2
+gtid_binlog_pos	4294967295-1-3
+gtid_binlog_state	4294967295-1-3
+gtid_current_pos	
+gtid_slave_pos	
+wsrep_gtid_domain_id	4294967295
+wsrep_gtid_mode	1
+# On node_1
+DROP TABLE t1, t2;
+# End of test

mysql-test/suite/galera/t/mdev_10518.cnf

+!include ../galera_2nodes.cnf
+
+[mysqld]
+log-bin
+log-slave-updates
+
+[mysqld.1]
+gtid_domain_id=1
+wsrep_gtid_mode=ON
+# Maximum allowed wsrep_gtid_domain_id.
+wsrep_gtid_domain_id=4294967295
+
+[mysqld.2]
+gtid_domain_id=2
+wsrep_gtid_mode=ON
+#wsrep_gitd_domain_id value will be inherited from donor node (mysqld.1)
+#wsrep_gitd_domain_id=X 

mysql-test/suite/galera/t/mdev_10518.test

+# Test for @@wsrep_gtid_mode and @@wsrep_gtid_domain_id variables
+#
+# When @@wsrep_gtid_mode=ON, all DDL/DML commands and transactions that
+# are meant to be replicated over Galera cluster nodes are tagged with
+# galera gtid_domain_id (@@wsrep_gtid_domain_id), while others are tagged
+# with the local domain_id (@@gtid_domain_id).
+
+--source include/galera_cluster.inc
+--source include/have_innodb.inc
+
+--echo # On node_1
+--connection node_1
+# print initial GTIDs
+source include/print_gtid.inc;
+
+--echo # On node_2
+--connection node_2
+# print initial GTIDs
+source include/print_gtid.inc;
+
+--echo # On node_1
+--connection node_1
+CREATE TABLE t1(i INT) ENGINE=INNODB;
+CREATE TABLE t2(i INT) ENGINE=MEMORY;
+INSERT INTO t1 VALUES(1);
+SELECT * FROM t1;
+SELECT * FROM t2;
+source include/print_gtid.inc;
+
+--echo # On node_2
+--connection node_2
+SELECT * FROM t1;
+source include/print_gtid.inc;
+
+--echo # On node_1
+--connection node_1
+INSERT INTO t2 VALUES(1);
+SELECT * FROM t2;
+source include/print_gtid.inc;
+
+--echo # On node_2
+--connection node_2
+SELECT * FROM t2;
+source include/print_gtid.inc;
+
+--echo # On node_1
+--connection node_1
+# Cleanup
+DROP TABLE t1, t2;
+
+--source include/galera_end.inc
+--echo # End of test
+

sql/wsrep_sst.cc

@@ -477,7 +477,7 @@ static void* sst_joiner_thread (void* a)
       } else {
         // Scan state ID first followed by wsrep_gtid_domain_id.
         char uuid[512];
-        long int domain_id;
+        unsigned long int domain_id;
         size_t len= pos - out + 1;
 
         if (len > sizeof(uuid)) goto err;       // safety check
@@ -491,11 +491,11 @@ static void* sst_joiner_thread (void* a)
         else if (wsrep_gtid_mode)
         {
           errno= 0;                             /* Reset the errno */
-          domain_id= strtol(pos + 1, NULL, 10);
+          domain_id= strtoul(pos + 1, NULL, 10);
           err= errno;
 
           /* Check if we received a valid gtid_domain_id. */
-          if (err == EINVAL || err == ERANGE || domain_id < 0x0 || domain_id > 0xFFFF)
+          if (err == EINVAL || err == ERANGE)
           {
             WSREP_ERROR("Failed to get donor wsrep_gtid_domain_id.");
             err= EINVAL;