Clarify 'marking connection as too old' messages

Back when we changed the idea of a connection being "too old" for new
circuits into the connection being "bad" for new circuits, we didn't
actually change the info messages.  This led to telling the user that
we were labelling connections as "too old" for being worse than
connections that were actually older than them.

Found by Scott on or-talk.

src/or/connection_or.c

@@ -608,7 +608,7 @@ connection_or_group_set_badness(or_connection_t *head)
       /* We have at least one open canonical connection to this router,
        * and this one is open but not canonical.  Mark it bad. */
       log_info(LD_OR,
-               "Marking OR conn to %s:%d as too old for new circuits: "
+               "Marking OR conn to %s:%d as unsuitable for new circuits: "
                "(fd %d, %d secs old).  It is not canonical, and we have "
                "another connection to that OR that is.",
                or_conn->_base.address, or_conn->_base.port, or_conn->_base.s,
@@ -648,7 +648,7 @@ connection_or_group_set_badness(or_connection_t *head)
          even when we're being forgiving. */
       if (best->is_canonical) {
         log_info(LD_OR,
-                 "Marking OR conn to %s:%d as too old for new circuits: "
+                 "Marking OR conn to %s:%d as unsuitable for new circuits: "
                  "(fd %d, %d secs old).  We have a better canonical one "
                  "(fd %d; %d secs old).",
                  or_conn->_base.address, or_conn->_base.port, or_conn->_base.s,
@@ -658,9 +658,9 @@ connection_or_group_set_badness(or_connection_t *head)
       } else if (!tor_addr_compare(&or_conn->real_addr,
                                    &best->real_addr, CMP_EXACT)) {
         log_info(LD_OR,
-                 "Marking OR conn to %s:%d as too old for new circuits: "
-                 "(fd %d, %d secs old).  We have a better one "
-                 "(fd %d; %d secs old).",
+                 "Marking OR conn to %s:%d as unsuitable for new circuits: "
+                 "(fd %d, %d secs old).  We have a better one with the "
+                 "same address (fd %d; %d secs old).",
                  or_conn->_base.address, or_conn->_base.port, or_conn->_base.s,
                  (int)(now - or_conn->_base.timestamp_created),
                  best->_base.s, (int)(now - best->_base.timestamp_created));