doc: output correct --help references with --program-prefix

* src/system.h (emit_ancillary_info): Take the invariant PROGRAM_NAME
as a parameter, so that consistent references are made to online docs
and texinfo nodes, when a --program-prefix is in place.  Note the
man pages don't need this fix as they're generated before the program
prefix is used.
* NEWS: Mention the improvements in references to online documentation.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/shred.c b/src/shred.c
index d17c870f8..b235b29ae 100644
--- a/src/shred.c
+++ b/src/shred.c
@@ -243,7 +243,7 @@ In addition, file system backups and remote mirrors may contain copies\n\
 of the file that cannot be removed, and that will allow a shredded file\n\
 to be recovered later.\n\
 "), stdout);
-      emit_ancillary_info ();
+      emit_ancillary_info (PROGRAM_NAME);
     }
   exit (status);
 }