Add <%{pid}> to default mail_log_prefix It's especially useful nowadays when the same session ID can be reused by multiple processes with IMAP hibernation enabled.

example-config: Update deliver_log_format comment

lib-storage: Add %{session} to mail_log_prefix by default Parameter is added to initialization string.

example-config: Updated deliver_log_format comments

auth: Added ability to truncate values logged by auth_verbose_passwords.

example-config: Fixed login_log_format comment.

example-config: Removed plugin/mail_log_group_events since it no longer exists.

example-config: Updated log_path comment to include syslog. --HG-- branch : HEAD

Added mail process pid to default login_log_format_elements --HG-- branch : HEAD

deliver_log_format: Added support for size and vsize --HG-- branch : HEAD

example-config: Added nn- prefix to *.conf files so the sort ordering makes more sense. This is especially important to get mail_plugins = $mail_plugins example working in protocol sections. --HG-- branch : HEAD