Issue in man page proc_pid_fd.5

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Without further ado, the following was found:

Issue:    When executing this commands, sudo prompts me for my password

"$B< echo test | sudo -u nobody cat>\n"
"test\n"
"$B< echo test | sudo -u nobody cat /proc/self/fd/0>\n"
"cat: /proc/self/fd/0: Permission denied\n"




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