The important part being:
connect() failed after select(): No route to host
So either your network is down, or something is blocking your connection to IRC.
I checked the log and the IRC connection fails even for the live connection. However, the key part actually seems to be this:
0 addresses found from DNS seeds
For the live connection, this list is not empty (it has 48 addresses). If I operate on the assumption that the live connection was NEVER able to connect to IRC, then it got that seed list from somewhere.