Fix help. "ipv6 ..." commands are for IPv6.
diff --git a/zebra/interface.c b/zebra/interface.c
index f237431..3520371 100644
--- a/zebra/interface.c
+++ b/zebra/interface.c
@@ -1275,7 +1275,7 @@
 DEFUN (ipv6_address,
        ipv6_address_cmd,
        "ipv6 address X:X::X:X/M",
-       "Interface Internet Protocol config commands\n"
+       "Interface IPv6 config commands\n"
        "Set the IP address of an interface\n"
        "IPv6 address (e.g. 3ffe:506::1/48)\n")
 {
@@ -1286,7 +1286,7 @@
        no_ipv6_address_cmd,
        "no ipv6 address X:X::X:X/M",
        NO_STR
-       "Interface Internet Protocol config commands\n"
+       "Interface IPv6 config commands\n"
        "Set the IP address of an interface\n"
        "IPv6 address (e.g. 3ffe:506::1/48)\n")
 {