extra/vsftpd: do not link to libcap-dev

extra/vsftpd/APKBUILD

 # Contributor: Carlo Landmeter <clandmeter@gmail.com>
 pkgname=vsftpd
 pkgver=2.1.0
-pkgrel=0
+pkgrel=1
 pkgdesc="Very secure ftpd"
 url="http://vsftpd.beasts.org"
 license="GPL"
 depends="openssl"
-makedepends="openssl-dev"
+makedepends="openssl-dev !libcap-dev"
 subpackages="$pkgname-doc"
 source="ftp://vsftpd.beasts.org/users/cevans/vsftpd-${pkgver}.tar.gz
 vsftpd-enable-ssl.patch