Some old stil (SBL) messages might include 'address' before 'network'?

Attempt to address error reported by Manitoo in IRC:
JavaScript sbbslist.js line 327: TypeError: bbs.network[network] is undefined

Normally, the "address:" key would always follow a "network:" key, but maybe
there's a corrupted message or the sysop is trying to import from the wrong
message base (not syncdata?).