community/dcron: modernize and update license

Regarding license change see [1].

[1]: https://github.com/dubiousjim/dcron/commit/1ba33c3325df48de46263276a43ed76cf9d81518

community/dcron/APKBUILD

@@ -2,40 +2,35 @@
 # Maintainer: Sören Tempel <soeren+alpine@soeren-tempel.net>
 pkgname=dcron
 pkgver=4.5
-pkgrel=4
+pkgrel=5
 pkgdesc="dillon's lightweight cron daemon"
 url="https://github.com/dubiousjim/dcron"
 arch="all"
-license="GPL"
-depends=""
-depends_dev=""
-makedepends=""
-install=""
+license="GPL-2.0-or-later"
 subpackages="$pkgname-doc"
-source="$pkgname-$pkgver.tar.gz::https://github.com/dubiousjim/$pkgname/archive/v$pkgver.tar.gz
+source="$pkgname-$pkgver.tar.gz::https://github.com/dubiousjim/dcron/archive/v$pkgver.tar.gz
 	$pkgname.initd
 	pidfile.patch
 	ldflags.patch"
 
-_builddir="$srcdir"/$pkgname-$pkgver
 build() {
-	cd "$_builddir"
+	cd "$builddir"
 	make PREFIX=/usr \
 		CRONTAB_GROUP=wheel \
 		CRONTABS=/etc/crontabs \
 		CRONSTAMPS=/var/spool/cron/cronstamps \
-		SCRONTABS=/etc/periodic || return 1
+		SCRONTABS=/etc/periodic
 }
 
 package() {
-	cd "$_builddir"
-	make DESTDIR="$pkgdir" install || return 1
+	cd "$builddir"
+	make DESTDIR="$pkgdir" install
 	install -Dm755 "$srcdir"/$pkgname.initd \
-		"$pkgdir"/etc/init.d/$pkgname || return 1
+		"$pkgdir"/etc/init.d/$pkgname
 
 	mkdir -p "$pkgdir"/usr/share/doc/$pkgname/
 	install -Dm644 README CHANGELOG \
-		"$pkgdir"/usr/share/doc/$pkgname/ || return 1
+		"$pkgdir"/usr/share/doc/$pkgname/
 }
 
 sha512sums="72b72c624f72861a6fc10f030ca2b764c5f3be9a0d8341663c5a0acc2fda7fef70770d200975805f184d2fb668ee4811693989a54b12dc5ef501877f6c4aca0e  dcron-4.5.tar.gz