back out most of 1d0ba9a

this was causing directory authorities to send a time of 0 on all
connections they generated themselves, which means everybody reachability
test caused a time skew warning in the log for that relay.

(i didn't just revert, because the changes file has been modified by
other later commits.)

src/or/connection_or.c

@@ -2051,9 +2051,8 @@ connection_or_send_netinfo(or_connection_t *conn)
   memset(&cell, 0, sizeof(cell_t));
   cell.command = CELL_NETINFO;
 
-  /* Timestamp, if we're a relay. */
-  if (! conn->handshake_state->started_here)
-    set_uint32(cell.payload, htonl((uint32_t)now));
+  /* Timestamp. */
+  set_uint32(cell.payload, htonl((uint32_t)now));
 
   /* Their address. */
   out = cell.payload + 4;