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Description of problem:
The man page and the info file (man points to this) does not mention
the use of PAM by the command 'su'. So it isn't obvious that you can
use /etc/pam.d/su to restrict access to this tool. Instead I was
tempted to mess around with the file permissions.


Version-Release number of selected component (if applicable):
coreutils-4.5.3-26

How reproducible:
Always

Steps to Reproduce:
1. man su | grep -i pam
2. info su | grep -i pam
3.
    

Actual Results:  (empty grep result)

Expected Results:  Some lines mentioning that su is using PAM.

Additional info:

It is only one example. PAM HowTos don't replace updated documentation
if a system is using PAM.