man: document usage of SD_BUS_CREDS_AUGMENT

diff --git a/man/sd_bus_query_sender_creds.xml b/man/sd_bus_query_sender_creds.xml
index d0769e8c85b0c83586bc46066bb394738b6f928d..47cc33670641016e56271056397e42d60239e0a2 100644 (file)
--- a/man/sd_bus_query_sender_creds.xml
+++ b/man/sd_bus_query_sender_creds.xml
@@ -50,7 +50,8 @@
     interested in. See
     <citerefentry><refentrytitle>sd_bus_creds_new_from_pid</refentrytitle><manvolnum>3</manvolnum></citerefentry>
     for a list of possible flags. First, this message checks if the requested credentials are attached to the
-    message itself. If not but the message contains the pid of the sender, this function tries to figure out
+    message itself. If not, but the message contains the pid of the sender and the caller specified the
+    <constant index='false'>SD_BUS_CREDS_AUGMENT</constant> flag, this function tries to figure out
     the missing credentials via other means (starting from the pid). If the pid isn't available but the
     message has a sender, this function calls
     <citerefentry><refentrytitle>sd_bus_get_name_creds</refentrytitle><manvolnum>3</manvolnum></citerefentry>