server: put server state into server config

This will make option parsing easier.

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
server: use tick in server state only

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
linear block: fix debug

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
block: accept 'strings'

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
file input block: configuration

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
server config: pass repeating entries as sequence

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>