changed signal by fd close to signal by vio_close

added support for kill expr
fixed coredump in set @a := foo;
added testcase for user_var
added testcase for kill


sql/slave.cc:
  fd -> vio
sql/sql_class.cc:
  fd->vio, fixed coredump on set @a := foo;
sql/sql_class.h:
  fd -> vio
sql/sql_repl.cc:
  fd -> vio
sql/sql_yacc.yy:
  added support for kill expr - needed this for a clean test case of kill

1 files changed, 2 insertions, 0 deletions

diff --git a/mysql-test/r/user_var.result b/mysql-test/r/user_var.result
new file mode 100644
index 00000000000..f1bfdf9116d
--- /dev/null
+++ b/mysql-test/r/user_var.result
@@ -0,0 +1,2 @@
+@a - connection_id()
+3