irc.client: Some small changes, and replace listen-to by listener objects of different types.
irc.client: Some small changes, and replace listen-to by listener objects of different types.

mcandre/factor,mrjbq7/factor,nicolas-p/factor,ceninan/factor,slavapestov/factor,kingcons/factor,seckar/factor,AlexIljin/factor,bjourne/factor,erg/factor,bjourne/factor,jwmerrill/factor,sarvex/factor-lang,bpollack/factor,factor/factor,mrjbq7/factor,nicolas-p/factor,mcandre/factor,factor/factor,erg/factor,littledan/Factor,dharmatech/factor,nicolas-p/factor,erg/factor,bpollack/factor,slavapestov/factor,ceninan/factor,tgunr/factor,dch/factor,littledan/Factor,sarvex/factor-lang,nicolas-p/factor,bjourne/factor,dch/factor,seckar/factor,factor/factor,sarvex/factor-lang,dch/factor,ehird/factor,sarvex/factor-lang,bjourne/factor,slavapestov/factor,cataska/factor,Keyholder/factor,slavapestov/factor,dch/factor,sarvex/factor-lang,AlexIljin/factor,erg/factor,mcandre/factor,sarvex/factor-lang,AlexIljin/factor,bjourne/factor,bpollack/factor,AlexIljin/factor,littledan/Factor,factor/factor,bpollack/factor,nicolas-p/factor,mrjbq7/factor,tgunr/factor,kingcons/factor,AlexIljin/factor,AlexIljin/factor,ceninan/factor,mcandre/factor,mrjbq7/factor,erg/factor,bjourne/factor,erg/factor,ehird/factor,tgunr/factor,kingcons/factor,bpollack/factor,erg/factor,slavapestov/factor,bjourne/factor,cataska/factor,ehird/factor,mcandre/factor,cataska/factor,dch/factor,tgunr/factor,nicolas-p/factor,mrjbq7/factor,dch/factor,nicolas-p/factor,mcandre/factor,Keyholder/factor,factor/factor,mcandre/factor,factor/factor,littledan/Factor,jwmerrill/factor,bpollack/factor,tgunr/factor,cataska/factor,seckar/factor,slavapestov/factor,kingcons/factor,bpollack/factor,jwmerrill/factor,ceninan/factor,dharmatech/factor,mrjbq7/factor,slavapestov/factor,Keyholder/factor,sarvex/factor-lang,dharmatech/factor,tgunr/factor,AlexIljin/factor