testing/libdap: fix url & src

- Switching url to https.
- The archive for some unknown reason changed after release (from ~2MiB to ~19MiB) causing the checksum to be incorrect. Upstream did not reply to email so changing src to github.
- Adding check().

testing/libdap/APKBUILD

@@ -2,16 +2,16 @@
 # Maintainer: Holger Jaekel <holger.jaekel@gmx.de>
 pkgname=libdap
 pkgver=3.20.5
-pkgrel=0
+pkgrel=1
 pkgdesc="The C++ DAP2 library from OPeNDAP"
-url="http://www.opendap.org/"
+url="https://www.opendap.org/"
 arch="all"
 license="LGPL-2.1-or-later"
-depends_dev="
-	libtirpc-dev
-	"
+depends_dev="libtirpc-dev"
 makedepends="
 	$depends_dev
+	autoconf
+	automake
 	bison
 	cppunit
 	curl-dev
@@ -20,24 +20,32 @@ makedepends="
 	fontconfig
 	graphviz
 	groff
+	libtool
 	libxml2-dev
 	ttf-freefont
-	util-linux
 	util-linux-dev
 	"
-subpackages="
-	$pkgname-dev
-	$pkgname-doc
-	"
-source="https://www.opendap.org/pub/source/libdap-$pkgver.tar.gz"
+subpackages="$pkgname-dev $pkgname-doc"
+source="$pkgname-$pkgver.tar.gz::https://github.com/OPENDAP/libdap4/archive/version-$pkgver.tar.gz"
+builddir="$srcdir/libdap4-version-$pkgver"
+
+prepare() {
+	default_prepare
+	autoreconf -fi
+}
 
 build() {
-	./configure --prefix=/usr \
+	./configure \
+		--prefix=/usr \
 		--disable-static
 	make
 	make docs
 }
 
+check() {
+	make check
+}
+
 package() {
 	make DESTDIR="$pkgdir" install
 
@@ -49,7 +57,4 @@ package() {
 	cp -pr html "$pkgdir"/usr/share/doc/$pkgname-doc
 }
 
-check() {
-	make check
-}
-sha512sums="727bf18bd8d8b296b2869622123de2c6b1d6fe7edba9f9aaacd06e9ba0e186703d83ada1d2a76482f322782245546710e0e04b2e2b59f705dc8d7df001fc24f7  libdap-3.20.5.tar.gz"
+sha512sums="24fa027256b037f5ba97eba45358bee6448252d64748eb8424a4ab3568d0d00476c7dd2bd3b45477f9d2f35c2a4ef31c1fef42dbe0ef53885b7feade8ea9c9ab  libdap-3.20.5.tar.gz"