freeradius: improved to build with '--with-udpfromto' to always reply from the IP the request was sent to

Note:

This is essential for "multi-homed" servers listening on multiple IPs.

security/freeradius/freeradius.conf

@@ -30,6 +30,9 @@ var_append extraconfopt ' ' "--with-system-libltdl"
 
 var_append extraconfopt ' ' "--with-large-files --disable-ltdl-install --disable-static"
 
+# always reply from the IP the request was sent to
+var_append extraconfopt ' ' "--with-udpfromto"
+
 if pkginstalled openldap; then
 	pkgprefix -t openldap
 	var_append extraconfopt ' ' "--with-rlm-ldap-lib-dir=$( pkgprefix libdir openldap )"