Don't abort on bootstrap if a wrong --default-storage-engine is specified


sql/handler.cc:
  Combined code
sql/mysqld.cc:
  Fixed core dump with long timezone names
  Don't abort on bootstrap if a wrong --default-storage-engine is specified
  Don't print strange messages if one sends 'kill' to a mysqld --bootstrap
sql/set_var.cc:
  Indentaion change