radvd.spec: Fix URL and add source code verification

Related: RHEL-141379

radvd.spec

@@ -2,11 +2,14 @@ Summary: A Router Advertisement daemon
 Name: radvd
 Version: 2.19
 Release: %autorelease
-
 License: radvd
-URL: http://www.litech.org/radvd/
-Source0: %{url}dist/%{name}-%{version}.tar.xz
-Source1: radvd.sysusers
+URL: https://radvd.litech.org
+
+Source0: https://radvd.litech.org/dist/%{name}-%{version}.tar.xz
+Source1: https://radvd.litech.org/dist/%{name}-%{version}.tar.xz.asc
+# Robin Hugh Johnson's public key
+Source2: https://github.com/robbat2.gpg
+Source3: radvd.sysusers
 Patch0: radvd-c99-1.patch
 Patch1: radvd-c99-2.patch
 Patch2: radvd-configure-c99.patch
@@ -24,6 +27,7 @@ BuildRequires: systemd-rpm-macros
 %{?sysusers_requires_compat}
 BuildRequires: autoconf
 BuildRequires: automake
+BuildRequires: gnupg2
 
 %description
 radvd is the router advertisement daemon for IPv6.  It listens to router
@@ -37,6 +41,7 @@ Install radvd if you are setting up IPv6 network and/or Mobile IPv6
 services.
 
 %prep
+%{gpgverify} --keyring='%{SOURCE2}' --signature='%{SOURCE1}' --data='%{SOURCE0}'
 %autosetup -p1 
 
 for F in CHANGES; do
@@ -68,7 +73,7 @@ install -m 644 redhat/SysV/radvd.sysconfig %{buildroot}%{_sysconfdir}/sysconfig/
 install -d -m 755 %{buildroot}%{_tmpfilesdir}
 install -p -m 644 redhat/systemd/radvd-tmpfs.conf %{buildroot}%{_tmpfilesdir}/radvd.conf
 install -m 644 redhat/systemd/radvd.service %{buildroot}%{_unitdir}
-install -p -D -m 0644 %{SOURCE1} %{buildroot}%{_sysusersdir}/radvd.conf
+install -p -D -m 0644 %{SOURCE3} %{buildroot}%{_sysusersdir}/radvd.conf
 
 %check
 make check
@@ -83,7 +88,7 @@ make check
 %systemd_preun radvd.service
 
 %pre
-%sysusers_create_compat %{SOURCE1}
+%sysusers_create_compat %{SOURCE3}
 
 %files
 %doc CHANGES COPYRIGHT INTRO.html README TODO