app-emulation/dosemu: fix SRC_URI to be a stable link

sourceforge expires tarball links to arbitrary snapshots
and generates unstable snapshots. Use a tarball copy instead.

Reported-by: Plüss Roland
Closes: https://bugs.gentoo.org/684410
Package-Manager: Portage-2.3.65, Repoman-2.3.12
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

app-emulation/dosemu/dosemu-1.4.1_pre20130107-r5.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2018 Gentoo Foundation
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
@@ -7,11 +7,13 @@ inherit autotools eutils flag-o-matic pax-utils toolchain-funcs
 
 P_FD="dosemu-freedos-1.0-bin"
 COMMIT="15cfb41ff20a052769d753c3262c57ecb050ad71"
+# snapshot is downloaded as:
+# https://sourceforge.net/code-snapshots/git/d/do/dosemu/code.git/dosemu-code-${COMMIT}.zip
 
 DESCRIPTION="DOS Emulator"
 HOMEPAGE="http://www.dosemu.org/"
 SRC_URI="mirror://sourceforge/dosemu/${P_FD}.tgz
-	https://sourceforge.net/code-snapshots/git/d/do/dosemu/code.git/dosemu-code-${COMMIT}.zip -> ${P}.zip"
+	https://dev.gentoo.org/~slyfox/distfiles/${P}.zip"
 
 LICENSE="GPL-2"
 SLOT="0"