pptpd: use boolean options

Use boolean options and fix the relevant init error.

Signed-off-by: Vladislav Grigoryev <vg.aetera@gmail.com>

net/pptpd/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=pptpd
 PKG_VERSION:=1.4.0
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=@SF/poptop

net/pptpd/files/pptpd.init

@@ -18,11 +18,11 @@ validate_login_section() {
 
 validate_pptpd_section() {
 	uci_load_validate pptpd service "$1" "$2" \
-		'enabled:uinteger' \
+		'enabled:bool:1' \
 		'localip:string' \
 		'remoteip:string' \
 		'mppe:list(string):required no40 no56 stateless' \
-		'logwtmp:uinteger'
+		'logwtmp:bool:0'
 }
 
 setup_login() {