2 bugfixes:

- Bug #985: "Between RESET SLAVE and START SLAVE, SHOW SLAVE STATUS is wrong."
Now RESET SLAVE puts correct info in mi->host etc. A new test rpl_reset_slave
for that.
- Bug #986: "CHANGE MASTER & START SLAVE do not reset error columns in SHOW
SLAVE STATUS". Now these reset the errors.


mysql-test/r/rpl_loaddata.result:
  result update.
mysql-test/t/rpl_loaddata.test:
  Test that RESET SLAVE, START SLAVE and CHANGE MASTER all reset 
  Last_slave_error and Last_slave_errno (columns of SHOW SLAVE STATUS).
  We do it in this test because that's one of tests which have 
  an intentional query error on the slave.
sql/slave.cc:
  As we need TWICE the code to copy command-line options (--master-host etc)
  to mi (we already had it in init_master_info, but we also need it in RESET
  SLAVE to fix bug#985), I make a function of this code.
  And a function to reset Last_slave_error and Last_slave_errno (we need
  it in CHANGE MASTER, RESET SLAVE, and at the start of the SQL thread).
sql/slave.h:
  declarations for new functions.
sql/sql_repl.cc:
  copy --master-host etc to mi in RESET SLAVE, so that SHOW SLAVE STATUS
  shows correct information.

1 files changed, 2 insertions, 0 deletions

diff --git a/sql/slave.h b/sql/slave.h
index d1fd54d3c04..193b0ab9dd7 100644
--- a/sql/slave.h
+++ b/sql/slave.h
@@ -389,6 +389,8 @@ void skip_load_data_infile(NET* net);
 void slave_print_error(RELAY_LOG_INFO* rli, int err_code, const char* msg, ...);
 
 void end_slave(); /* clean up */
+void init_master_info_with_options(MASTER_INFO* mi);
+void clear_last_slave_error(RELAY_LOG_INFO* rli);
 int init_master_info(MASTER_INFO* mi, const char* master_info_fname,
 		     const char* slave_info_fname,
 		     bool abort_if_no_master_info_file);