Clarify that the resource module does not attempt to mask platform
differences by defining symbols not defined on particular platforms.
This closes SF bug #473433.
diff --git a/Doc/lib/libresource.tex b/Doc/lib/libresource.tex
index 81e5aeb..33de531 100644
--- a/Doc/lib/libresource.tex
+++ b/Doc/lib/libresource.tex
@@ -67,7 +67,9 @@
The \UNIX{} man page for \manpage{getrlimit}{2} lists the available
resources. Note that not all systems use the same symbol or same
-value to denote the same resource.
+value to denote the same resource. This module does not attempt to
+mask platform differences --- symbols not defined for a platform will
+not be available from this module on that platform.
\begin{datadesc}{RLIMIT_CORE}
The maximum size (in bytes) of a core file that the current process