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/od.c b/src/od.c
index c32d785aa..18b16836d 100644
--- a/src/od.c
+++ b/src/od.c
@@ -414,7 +414,7 @@ BYTES is hex with 0x or 0X prefix, and may have a multiplier suffix:\n\
   M    1024*1024\n\
 and so on for G, T, P, E, Z, Y.\n\
 "), stdout);
-      emit_ancillary_info ();
+      emit_ancillary_info (PROGRAM_NAME);
     }
   exit (status);
 }