missing source line in /etc/interfaces

[Hadmut Danisch]

The man page
man 5 interfaces
states:

       By default, on a freshly installed Debian system, the interfaces file includes a line to source files in the /etc/network/interfaces.d directory.

A freshly installed 17.10 system lacks this line (and therefore is unable to handle interfaces defined in interfaces.d)

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: debian-installer (not installed)
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.7-0ubuntu3.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Wed Nov 1 11:59:35 2017
InstallationDate: Installed on 2017-10-24 (8 days ago)
InstallationMedia: Lubuntu 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
MemoryUsage:
 total used free shared buff/cache available
 Mem: 16092028 2353888 7052132 42836 6686008 13895896
 Swap: 16380924 0 16380924
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-16-generic root=UUID=c100cc19-4ea7-4c2c-a2ee-10d8ed40c2e7 ro rootflags=subvol=@ nomodeset quiet splash
SourcePackage: debian-installer
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/16/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.50
dmi.board.name: N3150-NUC
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.50:bd03/16/2016:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnN3150-NUC:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.