sysvinit: take release tarballs from github

Upstream no longer publishes them on savannah, e.g.
release announcement for 3.10:
https://lists.gnu.org/archive/html/sysvinit-devel/2024-07/msg00016.html

There's been several new versions since:
https://github.com/slicer69/sysvinit/releases

(From OE-Core rev: 6cb71eaf3d225de14e62cfc1b76dc8094f8f4aed)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/sysvinit/sysvinit_3.04.bb

@@ -9,7 +9,8 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe \
 
 RDEPENDS:${PN} = "${PN}-inittab"
 
-SRC_URI = "${SAVANNAH_GNU_MIRROR}/sysvinit/sysvinit-${PV}.tar.xz \
+GITHUB_BASE_URI = "https://github.com/slicer69/${BPN}/releases/"
+SRC_URI = "${GITHUB_BASE_URI}/download/${PV}/${BP}.tar.xz \
            file://install.patch \
            file://crypt-lib.patch \
            file://pidof-add-m-option.patch \
@@ -27,7 +28,7 @@ SRC_URI[sha256sum] = "2a621fe6e4528bc91308b74867ddaaebbdf7753f02395c0c5bae817bd2
 
 S = "${WORKDIR}/sysvinit-${PV}"
 
-inherit update-alternatives features_check
+inherit update-alternatives features_check github-releases
 DEPENDS:append = " update-rc.d-native base-passwd virtual/crypt"
 do_package_setscene[depends] = "${MLPREFIX}base-passwd:do_populate_sysroot"