Increase directory node connection timeout to 60s

Prior to this commit, we timed out the attempts to connect to individual
directory nodes after 10s, which proves to be too optimistic for
connections to onions, as failures are often seen. After this commit, we
allow 60s (note that this time includes handshake completion).

jmdaemon/jmdaemon/onionmc.py

@@ -23,7 +23,7 @@ ONION_VIRTUAL_PORT = 5222
 
 # How many seconds to wait before treating an onion
 # as unreachable
-CONNECT_TO_ONION_TIMEOUT = 10
+CONNECT_TO_ONION_TIMEOUT = 60
 
 def location_tuple_to_str(t: Tuple[str, int]) -> str:
     return f"{t[0]}:{t[1]}"
@@ -1435,10 +1435,9 @@ class OnionMessageChannel(MessageChannel):
         # so we are guaranteed to have only directory peers.
         if len(self.get_connected_directory_peers()) < len(self.peers):
             self.directory_wait_counter += 1
-            # < 2*11 = 22 seconds; compare with CONNECT_TO_ONION_TIMEOUT;
-            # with current vals, we get to try twice before entirely
-            # giving up.
-            if self.directory_wait_counter < 11:
+            # Keep trying until the timeout.
+            # Note RHS need not be an integer.
+            if self.directory_wait_counter < CONNECT_TO_ONION_TIMEOUT/2 + 1:
                 return
         if len(self.get_connected_directory_peers()) == 0:
             # at least one handshake must have succeeded, for us
@@ -1446,6 +1445,9 @@ class OnionMessageChannel(MessageChannel):
             log.error("We failed to connect and handshake with "
                       "ANY directories; onion messaging is not functioning.")
             self.wait_for_directories_loop.stop()
+            # notice that in this failure mode, we do *not* shut down
+            # the entire process, as this is only a failure to connect
+            # to one message channel, and others (e.g. IRC) may be working.
             return
         # This is what triggers the start of taker/maker workflows.
         # Note that even if the preceding (max) 50 seconds failed to