modified:
  storage/connect/ha_connect.cc
  storage/connect/tabdos.cpp
  storage/connect/tabfmt.cpp
  storage/connect/tabmysql.cpp

- add AVG_REC_LENGTH option to avoid result mismatch between
  Windows and Linux
modified:
  storage/connect/mysql-test/connect/r/part_file.result
  storage/connect/mysql-test/connect/r/part_table.result
  storage/connect/mysql-test/connect/t/part_file.test