Look at the correct protocol for supports_v3_rendezvous_point

Fixes bug 25105; bugfix on 0.3.2.1-alpha.

changes/bug25105

@@ -0,0 +1,5 @@
+  o Minor bugfixes (v3 onion services):
+    - Look at the "HSRend" protocol version, not the "HSDir" protocol
+      version, when deciding whether a consensus entry can support
+      the v3 onion service protocol as a rendezvous point.
+      Fixes bug 25105; bugfix on 0.3.2.1-alpha.

src/or/routerparse.c

@@ -2565,7 +2565,7 @@ summarize_protover_flags(protover_summary_flags_t *out,
       protocol_list_supports_protocol(protocols, PRT_HSDIR,
                                       PROTOVER_HSDIR_V3);
     out->supports_v3_rendezvous_point =
-      protocol_list_supports_protocol(protocols, PRT_HSDIR,
+      protocol_list_supports_protocol(protocols, PRT_HSREND,
                                       PROTOVER_HS_RENDEZVOUS_POINT_V3);
   }
   if (version && !strcmpstart(version, "Tor ")) {