If Http Driver is being unloaded or DisconnectController() without
invoke HttpBootStart(), this will cause an unexpected ASSERT.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Zhang Lubo <lubo.zhang@intel.com>
Reviewed-by: Sriram Subramanian <sriram-s@hpe.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19005 6f19259b-4bc3-4df7-8a09-765794883524