diff -ur man-pages-3.42.orig/man5/nsswitch.conf.5 man-pages-3.42/man5/nsswitch.conf.5
--- man-pages-3.42.orig/man5/nsswitch.conf.5	2012-09-12 13:48:59.000000000 +0200
+++ man-pages-3.42/man5/nsswitch.conf.5	2012-09-12 13:49:31.884553646 +0200
@@ -64,6 +64,11 @@
 .BR gethostbyname (3)
 and related functions.
 .TP
+.B initgroups
+Supplementary group access list, used by
+.BR getgrouplist (3)
+function.
+.TP
 .B netgroup
 Network-wide list of hosts and users, used for access rules.
 C libraries before glibc 2.1 supported netgroups only over NIS.
@@ -245,6 +250,10 @@
 .B return
 Return a result now.
 Do not call any further lookup functions.
+However, for compatibility reasons, if this is the selected action
+for the `group' database and the `notfound' status,
+and the configuration file does not contain the `initgroups' line,
+the next lookup function is always called, without affecting the search result.
 .TP
 .B continue
 Call the next lookup function.