udhcpc: document SIGUSRn effect in help text

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index 78aabedf2..7e5ab61fd 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -926,6 +926,10 @@ static void client_background(void)
 //usage:     "\n        -v              Verbose"
 //usage:        )
 //usage:        )
+//usage:     "\nSignals:"
+//usage:     "\n        USR1    Renew current lease"
+//usage:     "\n        USR2    Release current lease"
+
 
 int udhcpc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int udhcpc_main(int argc UNUSED_PARAM, char **argv)