Define the source URL differently in the case of a release candidate.

OBS-URL: https://build.opensuse.org/package/show/network:samba:STABLE/samba?expand=0&rev=337

samba.spec

@@ -107,6 +107,11 @@ BuildRequires:  libxslt-tools
 %endif
 %define	samba_ver 4.1.0
 %define	samba_ver_suffix rc2
+%if "%{samba_ver_suffix}" == ""
+%define samba_source_location http://ftp.samba.org/pub/samba/stable/samba-%{version}.tar.gz
+%else
+%define samba_source_location http://ftp.samba.org/pub/samba/rc/samba-%{version}%{samba_ver_suffix}.tar.gz
+%endif
 %define	samba_ver_full %{samba_ver}%{samba_ver_suffix}
 %if 0%{?suse_version} && 0%{?suse_version} < 1111
 %define	guards_symbols pre_1111
@@ -125,7 +130,7 @@ BuildRequires:  libxslt-tools
 %else
 %define	build_make_smp_mflags %{?jobs:-j%jobs}
 %endif
-%define SOURCE_TIMESTAMP 3074
+%define SOURCE_TIMESTAMP 3075
 %define BRANCH %{version}
 %global with_mitkrb5 1
 %global with_dc 0
@@ -146,7 +151,7 @@ Recommends:     cron
 Recommends:     logrotate
 %endif
 Summary:        A SMB/CIFS File, Print, and Authentication Server
-Source:         http://samba.org/samba/ftp/samba-%{version}%{samba_ver_suffix}.tar.gz
+Source:         %{samba_source_location}
 Source1:        vendor-files.tar.bz2
 Source2:        patches.tar.bz2
 Source4:        baselibs.conf