add space to log output to have consistent identation
when i was new to opensmtpd i had a hard time figuring out what was missing. so i hopefully clarified this log message for good
 - Implement "dsn" option to listen to activate DSN
 - Change EXT_DSN to DSN
 - Switch from dsn to no-dsn, i.e. : DSN is activate by default
 - Do not parse NOTIFY and ORCPT smtp args if DSN isn't activated
Add no-dsn directive documentation in manpage
Merge pull request #460 from bocal/no-dsn_manpage

No dsn manpage
fix typo
Add no-dsn directive documentation in manpage
fix typo
missing include for memset
support variadic parameters in fatal while still being allocation free
Merge branch 'master' into portable
no longer use n-% of disk space as a disk reserve, instead use a
hardcoded number of blocks. I used 100 as is currently used by
Sendmail on OpenBSD
Merge pull request #459 from gretel/master

add space to log output to have consistent identation
Merge branch 'master' into portable

Conflicts:
	smtpd/queue_fs.c
missing smtp-in in log
Merge branch 'master' into portable
Various queue-proce related updates:
- try external queue /usr/libexec/smtpd/queue-<backend> if backend is not built-in.
- allow to pass a config string to the backend.
- make queue and scheduler backends consistent with tables and filters
Merge branch 'master' into portable

Conflicts:
	smtpd/smtpd.h