curl: Fix compilation

patches/openwrt/to-upstream/0001-curl-Disable-libpsl.patch

+From 4e9334e4daa0adc5f11efa97a2d70129ea384132 Mon Sep 17 00:00:00 2001
+From: Michal Hrusecky <michal.hrusecky@nic.cz>
+Date: Tue, 17 Jul 2018 13:23:51 +0200
+Subject: [PATCH] curl: Disable libpsl
+
+This library is available in packages repository, but not in the main one, so
+sometimes it can get autodetected and added as dependency.
+
+Signed-off-by: Michal Hrusecky <michal.hrusecky@nic.cz>
+---
+ package/network/utils/curl/Makefile | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/package/network/utils/curl/Makefile b/package/network/utils/curl/Makefile
+index 2e1e909..2f7cc7e 100644
+--- a/package/network/utils/curl/Makefile
++++ b/package/network/utils/curl/Makefile
+@@ -113,6 +113,7 @@ CONFIGURE_ARGS += \
+ 	--without-libmetalink \
+ 	--without-librtmp \
+ 	--without-libidn \
++	--without-libpsl \
+ 	--without-ca-path \
+ 	--with-ca-bundle=/etc/ssl/certs/ca-certificates.crt \
+ 	\
+-- 
+2.18.0
+