main/iproute2: trim the fat by splitting into subpackages

by using install_if, "apk add iproute2" still installs everything, but
alpine-base could depend on iproute2-minimal in future.  TC and SS are
also split into their own subpackages.

main/iproute2/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=iproute2
 pkgver=5.7.0
-pkgrel=0
+pkgrel=1
 pkgdesc="IP Routing Utilities"
 url="https://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2"
 arch="all"
 license="GPL-2.0-or-later"
 install="$pkgname.post-install"
 makedepends="bison flex bash iptables-dev elfutils-dev"
-subpackages="$pkgname-doc $pkgname-bash-completion:bashcomp:noarch"
+subpackages="$pkgname-doc $pkgname-bash-completion:bashcomp:noarch $pkgname-minimal $pkgname-tc $pkgname-ss"
 source="https://kernel.org/pub/linux/utils/net/iproute2/iproute2-$pkgver.tar.xz
 	fix-install-errors.patch
 	musl-fixes.patch"
@@ -33,13 +33,45 @@ build() {
 		--sysconfdir=/etc \
 		--mandir=/usr/share/man \
 		--localstatedir=/var
-	make CCOPTS="-D_GNU_SOURCE $CFLAGS"
+	make CCOPTS="-D_GNU_SOURCE $CFLAGS" V=1
 }
 
 package() {
 	make -j1 DESTDIR="$pkgdir" install
 }
 
+minimal() {
+	replaces="$pkgname"
+	pkgdesc="IP Routing Utilities (/sbin/ip only)"
+	install_if="$pkgname=$pkgver-r$pkgrel"
+
+	install -d -m755 "$subpkgdir"/sbin
+
+	mv "$pkgdir"/sbin/ip "$subpkgdir"/sbin/
+	mv "$pkgdir"/etc "$subpkgdir"/etc
+}
+
+tc() {
+	replaces="$pkgname"
+	pkgdesc="IP Routing Utilities (traffic control and XDP support)"
+	install_if="$pkgname=$pkgver-r$pkgrel"
+
+	install -d -m755 "$subpkgdir"/sbin
+
+	mv "$pkgdir"/sbin/tc "$subpkgdir"/sbin/
+	mv "$pkgdir"/usr "$subpkgdir"/usr
+}
+
+ss() {
+	replaces="$pkgname"
+	pkgdesc="IP Routing Utilities (socket statistics tool)"
+	install_if="$pkgname=$pkgver-r$pkgrel"
+
+	install -d -m755 "$subpkgdir"/sbin
+
+	mv "$pkgdir"/sbin/ss "$subpkgdir"/sbin/
+}
+
 bashcomp() {
 	depends=""
 	pkgdesc="Bash completions for $pkgname"