corkscrew: Update to working mirror

packages/corkscrew/build.sh

@@ -1,10 +1,8 @@
 TERMUX_PKG_HOMEPAGE=http://wiki.linuxquestions.org/wiki/Corkscrew
-# TERMUX_PKG_HOMEPAGE=http://www.agroman.net/corkscrew/
 TERMUX_PKG_DESCRIPTION="A tool for tunneling SSH through HTTP proxies"
 TERMUX_PKG_DEPENDS="openssh"
 TERMUX_PKG_VERSION=2.0
-# TERMUX_PKG_SRCURL=http://agroman.net/corkscrew/corkscrew-${TERMUX_PKG_VERSION}.tar.gz
-TERMUX_PKG_SRCURL=ftp://ftp.usa.openbsd.org/pub/OpenBSD/distfiles/corkscrew-${TERMUX_PKG_VERSION}.tar.gz
+TERMUX_PKG_SRCURL=https://dl.bintray.com/termux/upstream/corkscrew-${TERMUX_PKG_VERSION}.tar.gz
 TERMUX_PKG_SHA256=0d0fcbb41cba4a81c4ab494459472086f377f9edb78a2e2238ed19b58956b0be
 
 termux_step_post_make_install () {