Config: allow empty sections, just warn them

Signed-off-by: Eduardo Silva <eduardo@monkey.io>
Merge branch 'master' of github.com:monkey/monkey
Debian: fix PidFile path

Signed-off-by: Eduardo Silva <eduardo@monkey.io>
Debian: bump version to 1.5.0-2

Signed-off-by: Eduardo Silva <eduardo@monkey.io>
Merge branch 'master' of github.com:monkey/monkey