odhcp6c: fix "-S" usage

Commit 1d6c4e794cdb converted "-S" option from integer to boolean, but
usage wasn't properly updated.

Fixes: 1d6c4e794cdb ("src: convert allow_slaac_only to boolean")
Link: https://github.com/openwrt/odhcp6c/pull/136
Signed-off-by: Álvaro Fernández Rojas <[email protected]>

diff --git a/src/odhcp6c.c b/src/odhcp6c.c
index 123d9d3767fcdaa1eb5d15e02f4827ff37616c2c..6c6acd452c0dd7afac69f475d67689d5b13fcc94 100644 (file)
--- a/src/odhcp6c.c
+++ b/src/odhcp6c.c
@@ -776,7 +776,7 @@ static int usage(void)
        const char buf[] =
        "Usage: odhcp6c [options] <interface>\n"
        "\nFeature options:\n"
-       "       -S <time>       Wait at least <time> sec for a DHCP-server (0)\n"
+       "       -S              Don't allow configuration via SLAAC (RAs) only\n"
        "       -D              Discard advertisements without any address or prefix proposed\n"
        "       -N <mode>       Mode for requesting addresses [try|force|none]\n"
        "       -P <[pfx/]len>  Request IPv6-Prefix (0 = auto)\n"