cmdgen: document --dump in the online help.

There's always something.

1 files changed, 1 insertions, 0 deletions

diff --git a/cmdgen.c b/cmdgen.c
index c4340ecc..ebc55553 100644
--- a/cmdgen.c
+++ b/cmdgen.c
@@ -104,6 +104,7 @@ void help(void)
            "  -l    equivalent to `-O fingerprint'\n"
            "  -L    equivalent to `-O public-openssh'\n"
            "  -p    equivalent to `-O public'\n"
+           "  --dump   equivalent to `-O text'\n"
            "  --old-passphrase file\n"
            "        specify file containing old key passphrase\n"
            "  --new-passphrase file\n"