transmission: Fix HTTPS and mobile devices.

HTTPS verification is totally broken in Transmission. Unclear why. Disabling as a result.

Safari exposes a JavaScript bug that makes it not load. Fixed.

Portcheck was backported to HTTPS for testing initially. Seems like a good idea.

Makefile was also fixed to use the external libnatpmp. Smaller binary.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

net/transmission/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=transmission
 PKG_VERSION:=2.93
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@GITHUB/transmission/transmission-releases/master
@@ -124,6 +124,7 @@ CONFIGURE_ARGS += \
 	--enable-daemon \
 	--enable-cli \
 	--without-gtk \
+	--enable-external-natpmp \
 	--enable-largefile \
 	--enable-lightweight