test fixes for FreeBSD

* FreeBSD returns errno 31 (EMLINK, Too many links),
  not 40 (ELOOP, Too many levels of symbolic links)
* (`mysqlbinlog|mysql`) was just crazy, why did it ever work?
* socket_ipv6.inc check (that checked whether ipv6 is supported)
  only worked correctly when ipv6 was supported
* perfschema.socket_summary_by_instance was changing global variables
  and then skip-ing the test (because on missing ipv6)

mysql-test/main/repair_symlink-5543.result

 create table t1 (a int) engine=myisam data directory='MYSQL_TMP_DIR';
 insert t1 values (1);
-# Some systems fail with errcode 40, or 90 (MIPS) when doing openat,
+# Some systems fail with errcode 31 (FreeBSD), 40, or 90 (MIPS) when doing openat,
 # while others don't have openat and fail with errcode 20.
 repair table t1;
 Table	Op	Msg_type	Msg_text

mysql-test/main/repair_symlink-5543.test

@@ -9,9 +9,9 @@
 eval create table t1 (a int) engine=myisam data directory='$MYSQL_TMP_DIR';
 insert t1 values (1);
 --system ln -s $MYSQL_TMP_DIR/foobar5543 $MYSQL_TMP_DIR/t1.TMD
---echo # Some systems fail with errcode 40, or 90 (MIPS) when doing openat,
+--echo # Some systems fail with errcode 31 (FreeBSD), 40, or 90 (MIPS) when doing openat,
 --echo # while others don't have openat and fail with errcode 20.
---replace_regex / '.*\/t1/ 'MYSQL_TMP_DIR\/t1/ /[49]0/20/ /".*"/"<errmsg>"/
+--replace_regex / '.*\/t1/ 'MYSQL_TMP_DIR\/t1/ /[49]0|31/20/ /".*"/"<errmsg>"/
 repair table t1;
 drop table t1;
 
@@ -19,7 +19,7 @@ drop table t1;
 eval create table t2 (a int) engine=aria data directory='$MYSQL_TMP_DIR';
 insert t2 values (1);
 --system ln -s $MYSQL_TMP_DIR/foobar5543 $MYSQL_TMP_DIR/t2.TMD
---replace_regex / '.*\/t2/ 'MYSQL_TMP_DIR\/t2/ /[49]0/20/ /".*"/"<errmsg>"/
+--replace_regex / '.*\/t2/ 'MYSQL_TMP_DIR\/t2/ /[49]0|31/20/ /".*"/"<errmsg>"/
 repair table t2;
 drop table t2;
 

mysql-test/main/temp_table_symlink.test

@@ -14,6 +14,7 @@ for (<#sql*.MYI>) {
   symlink "$ENV{datadir}/test/d1.MYI", sprintf "#sql$1_$2%x.MYI", hex($3)+1;
   symlink "$ENV{datadir}/test/d1.MYI", sprintf "#sql$1_$2%x.MAI", hex($3)+1;
   symlink "$ENV{datadir}/test/d1.MYI", sprintf "#sql$1_$2%x.MAI", hex($3)+2;
+  symlink "$ENV{datadir}/test/d1.MYI", sprintf "#sql$1_$2%x.MAI", hex($3)+3;
   symlink "$ENV{datadir}/test/d1.MYI", "#sql_$1_0.MAI";
 }
 EOF

mysql-test/suite/binlog/t/binlog_mysqlbinlog_stop_never.test

@@ -43,10 +43,7 @@ DROP TABLE t1;
 set @@SESSION.SQL_LOG_BIN = 1;
 
 --echo # Step-3: Execute MYSQL_BINLOG with --stop-never and source it to mysql client.
---write_file $MYSQL_TMP_DIR/mysqlbinlog_stop_never.sh
-(`$MYSQL_BINLOG --read-from-remote-server --stop-never --user=root --host=127.0.0.1 --port=$MASTER_MYPORT  master-bin.000001 | $MYSQL --user=root --protocol=tcp --host=127.0.0.1 --port=$MASTER_MYPORT`) < /dev/null > /dev/null 2>&1  &
-EOF
---exec /bin/bash $MYSQL_TMP_DIR/mysqlbinlog_stop_never.sh
+--exec ($MYSQL_BINLOG --read-from-remote-server --stop-never --user=root --host=127.0.0.1 --port=$MASTER_MYPORT  master-bin.000001 | $MYSQL --user=root --protocol=tcp --host=127.0.0.1 --port=$MASTER_MYPORT) < /dev/null > /dev/null 2>&1  &
 
 --echo # Step-4: Wait till dump thread transfer is completed.
 let $wait_condition= SELECT id from information_schema.processlist where processlist.command like '%Binlog%' and state like '%Master has sent%';
@@ -62,5 +59,3 @@ source include/wait_until_rows_count.inc;
 --source include/stop_dump_threads.inc
 
 DROP TABLE t1;
---remove_file $MYSQL_TMP_DIR/mysqlbinlog_stop_never.sh
-

mysql-test/suite/perfschema/include/socket_ipv6.inc

@@ -20,6 +20,7 @@ let $check_ipv6_just_check= 1;
 #==============================================================================
 --disable_query_log
 --disable_result_log
+--disable_connect_log
 --disable_abort_on_error
 
 let $check_ipv6_supported= 1;
@@ -44,6 +45,7 @@ if(!$mysql_errno)
 connection default;
 
 --enable_abort_on_error
+--enable_connect_log
 --enable_result_log
 --enable_query_log
 
@@ -62,6 +64,7 @@ let $check_ipv4_mapped_just_check= 1;
 #==============================================================================
 --disable_query_log
 --disable_result_log
+--disable_connect_log
 --disable_abort_on_error
 
 let $check_ipv4_mapped_supported= 1;
@@ -86,6 +89,7 @@ if(!$mysql_errno)
 connection default;
 
 --enable_abort_on_error
+--enable_connect_log
 --enable_result_log
 --enable_query_log
 

mysql-test/suite/perfschema/r/socket_connect.result

 #==============================================================================
 # Establish the level of IPV6 support
 #==============================================================================
-connection default;
 #==============================================================================
 # Get hostname, port number
 #==============================================================================

mysql-test/suite/perfschema/r/socket_summary_by_event_name_func.result

 #==============================================================================
 # Establish the level of IPV6 support
 #==============================================================================
-connection default;
 #==============================================================================
 # Get hostname, port number
 #==============================================================================

mysql-test/suite/perfschema/t/socket_summary_by_instance_func.test

@@ -38,8 +38,6 @@
 # prepared statement.
 --source include/no_protocol.inc
 
-set global session_track_schema=FALSE;
-
 #===================================
 # Set IP address defaults with respect to IPV6 support
 #
@@ -73,6 +71,7 @@ if($my_socket_debug)
   --echo IPV6=$check_ipv6_supported, IPV4_MAPPED = $check_ipv4_mapped_supported, LOCALHOST = $my_localhost
 }
 #===================================
+set global session_track_schema=FALSE;
 
 --echo # The logging of commands and result sets is mostly disabled.
 --echo # There are some messages which help to observe the progress of the test.