configs/*/airootfs/etc/systemd/system/systemd-networkd-wait-online.service.d/wait-for-only-one-interface.conf: document why the drop-in file exists

Related to #142.

Add missing `ExecStart=` to baseline's /etc/systemd/system/systemd-networkd-wait-online.service.d/wait-for-only-one-interface.conf.

1 files changed, 4 insertions, 0 deletions

diff --git a/configs/baseline/airootfs/etc/systemd/system/systemd-networkd-wait-online.service.d/wait-for-only-one-interface.conf b/configs/baseline/airootfs/etc/systemd/system/systemd-networkd-wait-online.service.d/wait-for-only-one-interface.conf
index a4d7442..191db81 100644
--- a/configs/baseline/airootfs/etc/systemd/system/systemd-networkd-wait-online.service.d/wait-for-only-one-interface.conf
+++ b/configs/baseline/airootfs/etc/systemd/system/systemd-networkd-wait-online.service.d/wait-for-only-one-interface.conf
@@ -1,5 +1,9 @@
 #
 # SPDX-License-Identifier: GPL-3.0-or-later
 
+# Allow systemd-networkd-wait-online to succeed with one interface, otherwise, if multiple network interfaces exist,
+# network-online.target gets needlessly delayed.
+# See https://wiki.archlinux.org/title/systemd-networkd#systemd-networkd-wait-online
 [Service]
+ExecStart=
 ExecStart=/usr/lib/systemd/systemd-networkd-wait-online --any