Replaced 3 TLS methods on Engine with single set_tls_options() method

darcs-hash:20090313173944-58103-c398526c10232209351c13263fbe8b838885a709
Added tls_timeout start option and attribute to Engine

darcs-hash:20090313175403-58103-967c660756f5ad90f5b222b14deeb6ce7287a581