Debian packaging: update homepage links

We were pointing to the VCS as the "homepage", and didn't use the VCS
headers to point to it. Fix both.

debian/control

@@ -4,7 +4,9 @@ Maintainer: FedICT Servicedesk <servicedesk@fedict.be>
 Build-Depends: debhelper (>= 9), autotools-dev, libpcsclite-dev, libgtk-3-dev | libgtk2.0-dev (<= 2.24.11), libtool, lsb-release, libssl-dev, libxml2-dev, libcurl4-openssl-dev, libproxy-dev, openssl, libp11-kit-dev, libassuan-dev, libgpg-error-dev
 Standards-Version: 3.8.3
 Section: libs
-Homepage: http://github.com/Fedict/eid-mw
+Vcs-Browser: https://github.com/Fedict/eid-mw
+Vcs-Git: https://github.com/Fedict/eid-mw
+Homepage: https://eid.belgium.be/
 
 Package: eid-mw
 Section: metapackages