capabilities.7: Document a new use of CAP_SYS_RESOURCE

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man7/capabilities.7

@@ -653,6 +653,13 @@ limit for a System V message queue above the limit in
 and
 .BR msgctl (2));
 .IP *
+allow the
+.B RLIMIT_NOFILE
+resource limit on the number of "in-flight" file descriptors
+to be bypassed when passing file descriptors to another process
+via a UNIX domain socket (see
+.BR unix (7));
+.IP *
 override the
 .I /proc/sys/fs/pipe-size-max
 limit when setting the capacity of a pipe using the