Bug #1402224: Add warning to dl docs about crashes.

Doc/lib/libdl.tex

@@ -10,6 +10,10 @@ The \module{dl} module defines an interface to the
 \UNIX{} platforms for handling dynamically linked libraries. It allows
 the program to call arbitrary functions in such a library.
 
+\warning{The \module{dl} module bypasses the Python type system and 
+error handling. If used incorrectly it may cause segmentation faults,
+crashes or other incorrect behaviour.}
+
 \note{This module will not work unless
 \code{sizeof(int) == sizeof(long) == sizeof(char *)}
 If this is not the case, \exception{SystemError} will be raised on

Misc/NEWS

@@ -727,6 +727,8 @@ Tests
 Documentation
 -------------
 
+- Bug #1402224: Add warning to dl docs about crashes.
+
 - Bug #1396471: Document that Windows' ftell() can return invalid
   values for text files with UNIX-style line endings.