launcher: prevent protocol module init errors from aborting execution

This fixes various issues including:
- Networks going missing (the server list is read in a non-deterministic order)
- world.started never being set, causing relay to never work!

launcher.py

@@ -139,12 +139,17 @@ def main():
             log.error("(%s) Configuration error: No protocol module specified, aborting.", network)
         else:
             # Fetch the correct protocol module.
+            try:
                 proto = utils.getProtocolModule(protoname)
 
                 # Create and connect the network.
                 world.networkobjects[network] = irc = proto.Class(network)
                 log.debug('Connecting to network %r', network)
                 irc.connect()
+            except:
+                log.exception('(%s) Failed to connect to network %r, skipping it...',
+                              network, network)
+                continue
 
     world.started.set()
     log.info("Loaded plugins: %s", ', '.join(sorted(world.plugins.keys())))