docs: link info about static user/group drop-in files from the relevant specs

poettering · poettering · commit f2147ed5eacf · 2021-05-10T14:59:26.000+02:00
diff --git a/docs/USER_GROUP_API.md b/docs/USER_GROUP_API.md
@@ -19,6 +19,12 @@ expose. Or in other words, it both allows applications to efficiently query
 user/group records from local services, and allows local subsystems to provide
 user/group records efficiently to local applications.
 
+The concepts described here define an IPC interface. Alternatively, user/group
+records may be dropped in number of drop-in directories as files where they are
+picked up in addition to the users/groups defined by this IPC logic. See
+[`nss-systemd(8)`](https://www.freedesktop.org/software/systemd/man/nss-systemd.html)
+for details.
+
 This simple API only exposes only three method calls, and requires only a small
 subset of the Varlink functionality.
 
diff --git a/docs/USER_RECORD.md b/docs/USER_RECORD.md
@@ -75,7 +75,11 @@ Records](https://systemd.io/GROUP_RECORD) that encapsulate UNIX groups.
 
 JSON User Records may be transferred or written to disk in various protocols
 and formats. To inquire about such records defined on the local system use the
-[User/Group Lookup API via Varlink](https://systemd.io/USER_GROUP_API).
+[User/Group Lookup API via
+Varlink](https://systemd.io/USER_GROUP_API). User/group records may also be
+dropped in number of drop-in directories as files. See
+[`nss-systemd(8)`](https://www.freedesktop.org/software/systemd/man/nss-systemd.html)
+for details.
 
 ## Why JSON?
 
