* don't use 'myf flags', when 'my_bool is_thread_specific' is meant
* call set_malloc_size_cb() for embedded too
* warn in safemalloc if the memory is freed by a wrong thread

sql/mysqld.cc:
  move set_malloc_size_cb() to a function that is also called for embedded
sql/mysqld.h:
  gdb-friendly, one can put breakpoint on a function, but not on a macro
sql/sql_class.cc:
  initialize thread_id earlier