udhcp: cosmetic cleanups; one case of s/full_read/xread/

function                                             old     new   delta
dumpleases_main                                      632     623      -9

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

networking/udhcp/dhcpc.c

@@ -1,6 +1,6 @@
 /* vi: set sw=4 ts=4: */
 /*
- * udhcp DHCP client
+ * udhcp client
  *
  * Russ Dill <Russ.Dill@asu.edu> July 2001
  *