let fdsrv return ignore for normal connection
let fdsrv return ignore for normal connection

Allow fdsrv to return the atom ignore, which tells yaws_server to just
listen normally. This is useful because fdsrv is global, but the user
might want to use it for just one virtual server while having listen
sockets for other virtual servers set up normally.

sebgod/yaws,phonohawk/yaws,namjae/yaws,imtal/yaws,toraritte/azith,toraritte/azith,klacke/yaws,weisslj/yaws,leoliu/yaws,jgrinstead/yaws,imtal/yaws,zephyrean/yaws,patternmatched/yaws,ca91/yaws,andreineculau/yaws,namjae/yaws,watonyweng/yaws,leoliu/yaws,andreineculau/yaws,capflam/yaws,watonyweng/yaws,phonohawk/yaws,capflam/yaws,zephyrean/yaws,patternmatched/yaws,namjae/yaws,leoliu/yaws,treacheroustalks/yaws,jgrinstead/yaws,patternmatched/yaws,phonohawk/yaws,zephyrean/yaws,treacheroustalks/yaws,jgrinstead/yaws,sebgod/yaws,sebgod/yaws,zephyrean/yaws,leoliu/yaws,phonohawk/yaws,toraritte/azith,ca91/yaws,watonyweng/yaws,capflam/yaws,bsmr-erlang/yaws,sebgod/yaws,klacke/yaws,klacke/yaws,sebgod/yaws,toraritte/azith,patternmatched/yaws,patternmatched/yaws,capflam/yaws,leoliu/yaws,klacke/yaws,bsmr-erlang/yaws,leoliu/yaws,namjae/yaws,toraritte/azith,watonyweng/yaws,weisslj/yaws,bsmr-erlang/yaws,andreineculau/yaws,ca91/yaws,sebgod/yaws,watonyweng/yaws,capflam/yaws,toraritte/azith,weisslj/yaws,weisslj/yaws,capflam/yaws,jgrinstead/yaws,zephyrean/yaws,jgrinstead/yaws,klacke/yaws,capflam/yaws,weisslj/yaws,patternmatched/yaws,bsmr-erlang/yaws,andreineculau/yaws,weisslj/yaws,ca91/yaws,ca91/yaws,zephyrean/yaws,zephyrean/yaws,bsmr-erlang/yaws,phonohawk/yaws,namjae/yaws,patternmatched/yaws,klacke/yaws,andreineculau/yaws,jgrinstead/yaws,sebgod/yaws,imtal/yaws,jgrinstead/yaws,watonyweng/yaws,imtal/yaws,bsmr-erlang/yaws,phonohawk/yaws,namjae/yaws,phonohawk/yaws,imtal/yaws,ca91/yaws,ca91/yaws,toraritte/azith,leoliu/yaws,watonyweng/yaws,weisslj/yaws,treacheroustalks/yaws,imtal/yaws,bsmr-erlang/yaws,namjae/yaws,treacheroustalks/yaws,klacke/yaws,imtal/yaws