Addressed most feedback from code review #1:
Addressed most feedback from code review #1:

* Introduced socksAuthCredentials as config variable
* kill socksAuthMethod
* simplified long conditionals
* truncated long lines

ssb22/polipo2,nxtreaming/chumen,nxtreaming/chumen,berkley4/polipo,TierraDelFuego/opilop,fqtools/polipo,feijilei/polipo,ssb22/polipo2,dxq-git/polipo,nxtreaming/chumen,jech/polipo,galeksandrp/polipo,ssb22/polipo2,dxq-git/polipo,galeksandrp/polipo,berkley4/polipo,galeksandrp/polipo,feijilei/polipo,jech/polipo,fqtools/polipo,dxq-git/polipo,feijilei/polipo,berkley4/polipo,fqtools/polipo,jech/polipo