htpdate: Update init script

This replaces the use of uci_validate_section() with
uci_load_validate(), which removes the need to declare local variables
for every config option.

This also corrects a variable name typo ("proxy" instead of
"proxy_host").

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

net/htpdate/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=htpdate
 PKG_VERSION:=1.1.1
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=http://www.vervest.org/htp/archive/c/