normally when too big to be suballocated) to handle big results.
modified:
  storage/connect/valblk.cpp
  storage/connect/valblk.h

- Add system variable connect_work_size giving the size of the CONNECT
  work area used for memory allocation.
modified:
  storage/connect/ha_connect.cc
  storage/connect/plugutil.c
  storage/connect/user_connect.cc