Merge branch 'mysql-wsrep-bugs_5.6-v25-MW-318' into mysql-wsrep-bugs_5.7-v25-MW-318

* mysql-wsrep-bugs_5.6-v25-MW-318:
  MW-318 Packaging: Preserve --wsrep-recover log for future reference when starting server

Author: vasild

scripts/mysqld_safe.sh

@@ -269,7 +269,16 @@ wsrep_recover_position() {
     wsrep_start_position_opt="--wsrep_start_position=$start_pos"
   fi
 
-  rm $wr_logfile
+  if [ $ret -eq 0 ] ; then
+    local wr_logfile_permanent="$DATADIR/wsrep_recovery.ok"
+  else
+    local wr_logfile_permanent="$DATADIR/wsrep_recovery.fail"
+  fi
+  touch $wr_logfile_permanent
+  [ "$euid" = "0" ] && chown $user $wr_logfile_permanent
+  chmod 600 $wr_logfile_permanent
+  cat "$wr_logfile" >> $wr_logfile_permanent
+  rm -f "$wr_logfile"
 
   return $ret
 }