Revert "Ignore localhost links" (on prefetch)
Revert "Ignore localhost links" (on prefetch)

This reverts commit 29b66ff0ec6bdd67c7c3168c383efe00bf94f75f.

Rationale:

1) It's not a security feature (abuse of prefetch can be on any server it's not
   more/less risky on localhost), it's pseudo-security measure
2) It's not to us to judge if it has no use-case (in fact it has, ex: two dev
   speaking and experimenting about urls of their local site/app instance,
   local web apps...)

refs #388

rockhouse/lounge,williamboman/lounge,williamboman/shout,realies/lounge,realies/lounge,sebastiencs/lounge,ScoutLink/lounge,diddledan/shout,cha2maru/shout,thelounge/lounge,MaxLeiter/lounge,erming/shout,run-project/shout,nickel715/shout,astorije/shout,metsjeesus/lounge,williamboman/lounge,ScoutLink/lounge,rockhouse/lounge,sebastiencs/lounge,MaxLeiter/lounge,libertysoft3/lounge-autoconnect,Audio/shout,sebastiencs/lounge,run-project/shout,FryDay/lounge,metsjeesus/lounge,cha2maru/shout,metsjeesus/lounge,realies/lounge,MaxLeiter/lounge,diddledan/shout,ScoutLink/lounge,libertysoft3/lounge-autoconnect,rockhouse/lounge,Calinou/shout,FryDay/lounge,Audio/shout,olivierlambert/shout,thelounge/lounge,MaxLeiter/shout,FryDay/lounge,williamboman/shout,erming/shout,williamboman/lounge,busseyl/shout,nickel715/shout,libertysoft3/lounge-autoconnect,harishanand95/shout_irc_bouncer_openshift,Calinou/shout,astorije/shout,olivierlambert/shout,busseyl/shout,harishanand95/shout_irc_bouncer_openshift,MaxLeiter/shout