Document -r flag

diff --git a/client/dhclient.8 b/client/dhclient.8
index a09fb8304d049ebcb0e49496f74fe799edd8b234..bfe22995602ba304adbf5d0f364a32e2a2580b25 100644 (file)
--- a/client/dhclient.8
+++ b/client/dhclient.8
@@ -36,6 +36,9 @@ dhclient - Dynamic Host Configuration Protocol Client
 [
 .B -c
 ]
+.B -r
+]
+[
 [
 .B -lf
 .I lease-file
@@ -174,6 +177,13 @@ facility.   The
 flag prevents any messages other than errors from being printed to the
 standard error descriptor.
 .PP
+The client normally doesn't release the current lease as it is not
+required by the DHCP protocol.  Some cable ISPs require their clients
+to notify the server if they wish to release an assigned IP address.
+The
+.B -r
+flag explicitly releases the current lease.
+.PP
 The DHCP client normally gets its configuration information from
 .B ETCDIR/dhclient.conf,
 its lease database from