Protocol_cursor task
net_field_length definitions trimmed with Monty's suggestions


BitKeeper/etc/ignore:
  Added sql/pack.c to the ignore list
include/my_global.h:
  my_ulonglong definition moved here from mysql.h
include/mysql.h:
  we define my_ulonglong here only if no global.h included
include/mysql_com.h:
  net_field_length_ll definition is here now
sql/mini_client.cc:
  unnecessary cast removed