Why do I see the message "Starting router: /usr/bin/dirname: extra operand `2>&1'" when starting jabberd?

Issue

Jabberd startup issues a diagnostic with each component (router, sm, c2s, s2s).

(1) jabberd and sub-processes consistently start with error diagnostics:
Initializing jabberd processes ...
Starting router: /usr/bin/dirname: extra operand `2>&1'
Try `/usr/bin/dirname --help' for more information.
                                                           [  OK  ]
Starting sm: /usr/bin/dirname: extra operand `2>&1'
Try `/usr/bin/dirname --help' for more information.
                                                           [  OK  ]
Starting c2s: /usr/bin/dirname: extra operand `2>&1'
Try `/usr/bin/dirname --help' for more information.
                                                           [  OK  ]
Starting s2s: /usr/bin/dirname: extra operand `2>&1'
Try `/usr/bin/dirname --help' for more information.
                                                           [  OK  ]