build-remote.pl: Indicate if remote machine is refusing builds
build-remote.pl: Indicate if remote machine is refusing builds

Fixes #120.

rowhit/nix,gridaphobe/nix,shlevy/nix,wmertens/nix,garbas/nix,tchajed/nix,ysangkok/nix,shlevy/nix,bennofs/nix,dezgeg/nix,dtzWill/nix,vizanto/nix,gebner/nix,vizanto/nix,rycee/nix,peti/nix,dezgeg/nix,acowley/nix,aucampia/nix,peti/nix,ttuegel/nix,offlinehacker/nix,offlinehacker/nix,bjornfor/nix,peti/nix,tchajed/nix,jcumming/nix,edolstra/nix,dtzWill/nix,NixOS/nix,ehmry/nix,dtzWill/nix,ehmry/nix,peti/nix,layus/nix,rowhit/nix,gridaphobe/nix,NixOS/nix,aucampia/nix,gebner/nix,acowley/nix,ttuegel/nix,bjornfor/nix,rycee/nix,wmertens/nix,puffnfresh/nix,tchajed/nix,puffnfresh/nix,vcunat/nix,dezgeg/nix,jcumming/nix,dezgeg/nix,peti/nix,pikajude/nix,shlevy/nix,rycee/nix,joelmo/nix,garbas/nix,gridaphobe/nix,tchajed/nix,dtzWill/nix,edolstra/nix,ehmry/nix,gridaphobe/nix,nbp/nix,offlinehacker/nix,aucampia/nix,shlevy/nix,zimbatm/nix,ysangkok/nix,ttuegel/nix,NixOS/nix,zimbatm/nix,zimbatm/nix,edolstra/nix,bjornfor/nix,acowley/nix,ehmry/nix,joelmo/nix,NixOS/nix,garbas/nix,dtzWill/nix,ttuegel/nix,layus/nix,garbas/nix,pikajude/nix,bennofs/nix,edolstra/nix,puffnfresh/nix,rowhit/nix,rycee/nix,joelmo/nix,rycee/nix,nbp/nix,pikajude/nix,jcumming/nix,bennofs/nix,vizanto/nix,NixOS/nix,gebner/nix,zimbatm/nix,layus/nix,shlevy/nix,nbp/nix,gebner/nix,bennofs/nix,aucampia/nix,layus/nix,acowley/nix,jcumming/nix,edolstra/nix,puffnfresh/nix,joelmo/nix,vcunat/nix,dezgeg/nix,layus/nix,bjornfor/nix,vizanto/nix,nbp/nix,garbas/nix,wmertens/nix,ysangkok/nix,vcunat/nix,ehmry/nix,ehmry/nix,wmertens/nix,vcunat/nix,offlinehacker/nix,rowhit/nix