Changed server's reconfiguration message to NOTICE so that it's always logged in syslog.
Merge pull request #1857 from jimis/log_server_reread_as_NOTICE

Changed server's reconfiguration message to NOTICE so that it's always logged in syslog.
Redmine 6304.
Simplify if/#if-ery to avoid confusing emacs indentation.
Add interface promise type
Complete references for syntax
Add RIP support examples of routing
Add expandrange function
Connectors for syntax to state
Remove overlay promise type, in favour of reserved array
Consolidate routes promises and flesh out the bodies
Add verify_{networks,interfaces}.[ch]
Renaming routing to networking
Syntax tweaks
Don't forget STP
Bind new promise types
Corrections and debug code for actuation
Save state of mockup
Homing in on the semantics
Implement IP address setting
Basic routing / network skeleton