fix warnings
When disabling a route mark the reason why: network error or smtp
issue.  This info is propagated on the connector error flags.  When
all connector fails, derive a more informative error message from the
error mask of all connectors.
fix segv in offline show queue
Merge branch 'master' of ssh://ssh.poolp.org/git/opensmtpd
document smtpctl show routes
document resume route
missing param on the command-line spec
Merge branch 'master' of ssh.poolp.org:/git/opensmtpd
missing fake read of message data
Error out if the state is invalid.
Implement command abbreviation when there is no ambiguity.