Some of the configuration options are common to all of the daemons. Which daemon they affect depends only on which sections of which configuration file they are in.
The first group of options are boolean flags, which can be set to "true" or "false". If not specified, default values will be chosen (generally false). Many of these flags controll debugging code that is probably of interest only to the developers.
debug_http:: Enable verbose http debug logging.
want_persistent_client:: Enable http 1.1 persistence, client side.
want_persistent_server:: Enable http 1.1 persistence, server side.
use_adns:: Use asynchronous DNS code. Enabling this will raise an exception if the dnspython toolkit is not installed. Asynchronous DNS is an experimental feature intended to allow higher throughput on busy servers; if you don't know why you need it, you probably don't.
enable_ipv6_clients:: Enable IPv6 HTTP client code.
enable_ipv6_servers:: Enable IPv6 HTTP server code. On by default, since listening for IPv6 connections is usually harmless.
debug_cms_certs:: Enable verbose logging about CMS certificates.
sql_debug:: Enable verbose logging about sql operations.
gc_debug:: Enable scary garbage collector debugging.
timer_debug:: Enable verbose logging of timer system.
enable_tracebacks:: Enable Python tracebacks in logs.
There are also a few options which allow you to save CMS messages for audit or debugging. The save format is a simple MIME encoding in a Maildir}-format mailbox. The current options are very crude, at some point we may provide finer grain controls.
dump_outbound_cms:: Dump verbatim copies of CMS messages we send to this mailbox.
dump_inbound_cms:: Dump verbatim copies of CMS messages we receive to this mailbox.