Re-apply missing changesets in 5.1

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)

sql/sql_base.cc

@@ -5488,7 +5488,7 @@ bool get_key_map_from_key_list(key_map *map, TABLE *table,
         0)
     {
       my_error(ER_KEY_COLUMN_DOES_NOT_EXITS, MYF(0), name->c_ptr(),
-	       table->s->table_name.str);
+               table->pos_in_table_list->alias);
       map->set_all();
       return 1;
     }

sql/sql_plugin.cc

@@ -843,6 +843,7 @@ my_bool mysql_install_plugin(THD *thd, LEX_STRING *name, LEX_STRING *dl)
 
   tmp->state= PLUGIN_IS_READY;
 
+  table->use_all_columns();
   restore_record(table, s->default_values);
   table->field[0]->store(name->str, name->length, system_charset_info);
   table->field[1]->store(dl->str, dl->length, files_charset_info);

sql/sql_show.cc

@@ -5448,9 +5448,9 @@ ST_FIELD_INFO files_fields_info[]=
   {"FREE_EXTENTS", 4, MYSQL_TYPE_LONG, 0, 0, 0},
   {"TOTAL_EXTENTS", 4, MYSQL_TYPE_LONG, 0, 0, 0},
   {"EXTENT_SIZE", 4, MYSQL_TYPE_LONG, 0, 0, 0},
-  {"INITIAL_SIZE", 8, MYSQL_TYPE_LONGLONG, 0, 0, 0},
-  {"MAXIMUM_SIZE", 8, MYSQL_TYPE_LONGLONG, 0, 0, 0},
-  {"AUTOEXTEND_SIZE", 8, MYSQL_TYPE_LONGLONG, 0, 0, 0},
+  {"INITIAL_SIZE", 21, MYSQL_TYPE_LONG, 0, 0, 0},
+  {"MAXIMUM_SIZE", 21, MYSQL_TYPE_LONG, 0, 0, 0},
+  {"AUTOEXTEND_SIZE", 21, MYSQL_TYPE_LONG, 0, 0, 0},
   {"CREATION_TIME", 0, MYSQL_TYPE_TIMESTAMP, 0, 0, 0},
   {"LAST_UPDATE_TIME", 0, MYSQL_TYPE_TIMESTAMP, 0, 0, 0},
   {"LAST_ACCESS_TIME", 0, MYSQL_TYPE_TIMESTAMP, 0, 0, 0},