socat: 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 adds a service_triggers() function and removes some
unnecessary curly brackets.

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

net/socat/Makefile

@@ -7,7 +7,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=socat
 PKG_VERSION:=1.7.3.2
-PKG_RELEASE:=4
+PKG_RELEASE:=5
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=http://www.dest-unreach.org/socat/download