doc: mention the texinfo documentation in --help

* src/system.h: Rename emit_bug_reporting_address() to
emit_ancillary_info() and update it to not print the translation
project address in en_* locales, and _do_ print it in the 'C'
(and other) locales so that it's included in the default man page.
Also mention how to invoke the texinfo documentation for each command.
Also move the "hard-locale.h" include to the 8 files that now use it.
* man/help2man: Strip the newly added texinfo reference from the
--help output as a more verbose version is already added by help2man.
Suggestion from C de-Avillez

1 files changed, 1 insertions, 1 deletions

diff --git a/src/printf.c b/src/printf.c
index 5fa25dee8..f6f86a573 100644
--- a/src/printf.c
+++ b/src/printf.c
@@ -130,7 +130,7 @@ and all C format specifications ending with one of diouxXfeEgGcs, with\n\
 ARGUMENTs converted to proper type first.  Variable widths are handled.\n\
 "), stdout);
       printf (USAGE_BUILTIN_WARNING, PROGRAM_NAME);
-      emit_bug_reporting_address ();
+      emit_ancillary_info ();
     }
   exit (status);
 }