made bisone 1.75 compatible code


mysql-test/r/group_by.result:
  test of function with agregate function inside
mysql-test/t/group_by.test:
  test of function with agregate function inside
sql/item_cmpfunc.cc:
  fixed functions to be able work with group function as argument
sql/item_cmpfunc.h:
  fixed functions to be able work with group function as argument
sql/item_func.cc:
  fixed functions to be able work with group function as argument
sql/item_func.h:
  fixed functions to be able work with group function as argument
sql/item_strfunc.cc:
  fixed functions to be able work with group function as argument
sql/item_strfunc.h:
  fixed functions to be able work with group function as argument
sql/sql_yacc.yy:
  made bisone 1.75 compatible code
BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted