Be more lenient in our fix for bug 11149

There are still quite a few 0.2.3.2x relays running for x<5, and while I
agree they should upgrade, I don't think cutting them out of the network
is a net win on either side.

changes/require_023

@@ -1,6 +1,6 @@
   o Deprecated versions:
     - Tor 0.2.2.x is no longer supported, and has not been for a while.
-      Directory authorities will stop accepting descriptors from
-      Tor relays running any version of Tor prior to Tor 0.2.3.25.
+      Directory authorities no longer accept descriptors from
+      Tor relays running any version of Tor prior to Tor 0.2.3.16-alpha.
       Resolves ticket 11149.
 

src/or/dirserv.c

@@ -374,9 +374,9 @@ dirserv_get_status_impl(const char *id_digest, const char *nickname,
               strmap_size(fingerprint_list->fp_by_name),
               digestmap_size(fingerprint_list->status_by_digest));
 
-  /* Versions before Tor 0.2.3.25 are too old to support, and aren't
-   * getting any more security fixes. Disable them. */
-  if (platform && !tor_version_as_new_as(platform,"0.2.3.25")) {
+  /* Versions before Tor 0.2.3.16-alpha are too old to support, and are
+   * missing some important security fixes too. Disable them. */
+  if (platform && !tor_version_as_new_as(platform,"0.2.3.16-alpha")) {
     if (msg)
       *msg = "Tor version is insecure or unsupported. Please upgrade!";
     return FP_REJECT;