unicode: s/FEATURE_ASSUME_UNICODE/UNICODE_SUPPORT, add UNICODE_USING_LOCALE

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/udhcp/dumpleases.c b/networking/udhcp/dumpleases.c
index 6ebda94..fb6219f 100644
--- a/networking/udhcp/dumpleases.c
+++ b/networking/udhcp/dumpleases.c
@@ -66,7 +66,7 @@
 			fmt = ":%02x";
 		}
 		addr.s_addr = lease.lease_nip;
-#if ENABLE_FEATURE_ASSUME_UNICODE
+#if ENABLE_UNICODE_SUPPORT
 		{
 			char *uni_name = unicode_conv_to_printable_fixedwidth(NULL, lease.hostname, 19);
 			printf(" %-16s%s ", inet_ntoa(addr), uni_name);