add --capture-comment to tshark's print_usage() function

make it clear that a capture comment can only be added when we
create a new file

svn path=/trunk/; revision=51091

1 files changed, 3 insertions, 0 deletions

diff --git a/tshark.c b/tshark.c
index 65748006eb..a302687e1b 100644
--- a/tshark.c
+++ b/tshark.c
@@ -337,6 +337,9 @@ print_usage(gboolean print_ver)
   fprintf(output, "                           n = write network address resolution information\n");
   fprintf(output, "  -X <key>:<value>         eXtension options, see the man page for details\n");
   fprintf(output, "  -z <statistics>          various statistics, see the man page for details\n");
+  fprintf(output, "  --capture-comment <comment>\n");
+  fprintf(output, "                           add a capture comment to the newly created\n");
+  fprintf(output, "                           output file (only for pcapng)\n");
 
   fprintf(output, "\n");
   fprintf(output, "Miscellaneous:\n");