user/nmap: add netcat subpackage

user/nmap/APKBUILD

@@ -14,7 +14,8 @@ subpackages="
 	$pkgname-scripts::noarch
 	$pkgname-nselibs::noarch
 	$pkgname-nping
-	$pkgname-ncat"
+	$pkgname-ncat
+	netcat::noarch"
 source="https://nmap.org/dist/$pkgname-$pkgver.tar.bz2"
 
 prepare() {
@@ -23,7 +24,6 @@ prepare() {
 }
 
 build() {
-	cd "$builddir"
         # zenmap and ndiff require python 2
 	./configure \
 		--build=$CBUILD \
@@ -44,12 +44,10 @@ build() {
 }
 
 check() {
-	cd "$builddir"
 	make check
 }
 
 package() {
-	cd "$builddir"
 	make DESTDIR="$pkgdir" install
 	install -Dm644 COPYING ${pkgdir}/usr/share/licenses/${pkgname}/LICENSE
 }
@@ -84,4 +82,12 @@ nping() {
 	mv "$pkgdir"/usr/bin/nping "$subpkgdir"/usr/bin
 }
 
+netcat() {
+	pkgdesc="Symlinks for netcat and nc to ncat"
+	depends="$pkgname-ncat"
+	mkdir -p "$subpkgdir"/usr/bin
+	ln -s ncat "$subpkgdir"/usr/bin/netcat
+	ln -s ncat "$subpkgdir"/usr/bin/nc
+}
+
 sha512sums="084c148b022ff6550e269d976d0077f7932a10e2ef218236fe13aa3a70b4eb6506df03329868fc68cb3ce78e4360b200f5a7a491d3145028fed679ef1c9ecae5  nmap-7.70.tar.bz2"