handling of init-file option added to embedded library
main problem was killing of output (resulting recordsets etc)
i added checks for empty output in Protocol:: methods
better solution could be special Protocol_nul class to redirect
results to nowhere


libmysqld/lib_sql.cc:
  code was added to call read_init_file
  Protocol methods now can support output to nowhere
sql/mysqld.cc:
  bootstrap function extended to work in embedded library
sql/sql_parse.cc:
  handle_bootstrap modified to work in embedded library