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

diff --git a/docs/USER_GROUP_API.md b/docs/USER_GROUP_API.md
index 51132b9a3fd776845de5268e5e89669b918bd5bb..bcb0b5d257ffdc66ea65e2c229ea3173b803f108 100644 (file)
--- 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
index 6cba02aa0c56c9f066bcb3a71d2f98b24162f38d..6435d2cf5f5f1a6b9a543f9e89293701b2b49370 100644 (file)
--- 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?