community/rtorrent: clarify license, modernize

community/rtorrent/APKBUILD

@@ -2,22 +2,19 @@
 # Contributor: Sören Tempel <soeren+alpine@soeren-tempel.net>
 # Contributor: Bartłomiej Piotrowski <nospam@bpiotrowski.pl>
 # Maintainer: Jakub Jirutka <jakub@jirutka.cz>
-
 pkgname=rtorrent
 pkgver=0.9.8
 pkgrel=0
 pkgdesc="Ncurses BitTorrent client based on libTorrent"
 url="https://rakshasa.github.io/rtorrent/"
-license="GPL"
+license="GPL-2.0-or-later"
 arch="all"
 makedepends="libsigc++-dev libtorrent-dev curl-dev xmlrpc-c-dev ncurses-dev"
 checkdepends="cppunit-dev"
 subpackages="$pkgname-doc"
 source="https://rtorrent.net/downloads/$pkgname-$pkgver.tar.gz"
-builddir="$srcdir/$pkgname-$pkgver"
 
 build() {
-	cd "$builddir"
 	./configure \
 		--build=$CBUILD \
 		--host=$CHOST \
@@ -32,12 +29,10 @@ build() {
 }
 
 check() {
-	cd "$builddir"
 	make check
 }
 
 package() {
-	cd "$builddir"
 	make DESTDIR="$pkgdir" install
 	install -Dm644 doc/rtorrent.rc "$pkgdir"/usr/share/doc/rtorrent/rtorrent.rc
 }