fix default config

rt/rt.spec

@@ -310,8 +310,8 @@ AutoReqProv:  no
         etc/upgrade/* \
         $RPM_BUILD_ROOT%{l_prefix}/libexec/rt/etc/upgrade/
       %{l_shtool} install -c -m 0644 \
-        -e '/Set(\$WebBaseURL/s;"["]*";"";' \
-        -e '/Set(\$WebImagesURL/s;/";";' \
+        -e '/Set($WebBaseURL/s;"[^"]*";"";' \
+        -e '/Set($WebImagesURL/s;/";";' \
         etc/RT_Config.pm \
         $RPM_BUILD_ROOT%{l_prefix}/etc/rt/RT_SiteConfig.pm
       rm -f \