BUG#19544 mysqldump does not backup TS and LG information correctly.
  
Problem was the type of the column was varchar(8) not an integer type. So mysqld
was outputting a string representation of the number in scientific notation,
which wasn't exact. Now we do it as a bigint and output the number in bytes.

Fix assertion when loading plugins due to handler changes



sql/sql_base.cc:
  manual merge (comment by igor)
sql/sql_plugin.cc:
  Fix assertion when loading plugins due to handler changes (By jimw)
sql/sql_show.cc:
  Correct type of I_S.FILES table columns: INITIAL_SIZE, MAXIMUM_SIZE and AUTOEXTEND_SIZE
  so that they really are bigint and not varchar. (By stewart)