[Qemu-block] [PATCH v3 23/44] qemu-io: Add missing option documentation

[Eric Blake]

Commit 499afa2 added --image-opts, but forgot to document it in
--help.  Likewise for commit 9e8f183 and -d/--discard.

Finally, commit 10d9d75 removed -g/--growable, but forgot to
cull it from the valid short options.

Signed-off-by: Eric Blake <address@hidden>
---
 qemu-io.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/qemu-io.c b/qemu-io.c
index 288bba8..cdc9497 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -221,6 +221,7 @@ static void usage(const char *name)
 "\n"
 "  --object OBJECTDEF   define an object such as 'secret' for\n"
 "                       passwords and/or encryption keys\n"
+"  --image-opts         treat file as option string\n"
 "  -c, --cmd STRING     execute command with its arguments\n"
 "                       from the given string\n"
 "  -f, --format FMT     specifies the block driver to use\n"
@@ -230,6 +231,7 @@ static void usage(const char *name)
 "  -m, --misalign       misalign allocations for O_DIRECT\n"
 "  -k, --native-aio     use kernel AIO implementation (on Linux only)\n"
 "  -t, --cache=MODE     use the given cache mode for the image\n"
+"  -d, --discard=MODE   use the given discard mode for the image\n"
 "  -T, --trace FILE     enable trace events listed in the given file\n"
 "  -h, --help           display this help and exit\n"
 "  -V, --version        output version information and exit\n"
@@ -410,7 +412,7 @@ static QemuOptsList file_opts = {
 int main(int argc, char **argv)
 {
     int readonly = 0;
-    const char *sopt = "hVc:d:f:rsnmgkt:T:";
+    const char *sopt = "hVc:d:f:rsnmkt:T:";
     const struct option lopt[] = {
         { "help", no_argument, NULL, 'h' },
         { "version", no_argument, NULL, 'V' },
-- 
2.5.5