use Getenv instead of LookupEnv so users can set USER="" and HOME="" + lookup different username only if it is different thant the current username
use Getenv instead of LookupEnv so users can set USER="" and HOME="" + lookup different username only if it is different thant the current username

dave2/packer,rnaveiras/packer,hashicorp/packer,tas50/packer,bryson/packer,grubernaut/packer,dave2/packer,youhong316/packer,rnaveiras/packer,timsutton/packer,mitchellh/packer,timsutton/packer,mitchellh/packer,tas50/packer,ricardclau/packer,rnaveiras/packer,pecigonzalo/packer,youhong316/packer,rnaveiras/packer,youhong316/packer,grubernaut/packer,bryson/packer,bryson/packer,timsutton/packer,dave2/packer,bryson/packer,ricardclau/packer,tas50/packer,mitchellh/packer,mkuzmin/packer,rnaveiras/packer,mkuzmin/packer,ricardclau/packer,hashicorp/packer,paulmey/packer,mitchellh/packer,bryson/packer,grubernaut/packer,ricardclau/packer,grubernaut/packer,pecigonzalo/packer,timsutton/packer,bryson/packer,rnaveiras/packer,youhong316/packer,grubernaut/packer,paulmey/packer,paulmey/packer,ricardclau/packer,dave2/packer,mkuzmin/packer,timsutton/packer,tas50/packer,paulmey/packer,grubernaut/packer,hashicorp/packer,tas50/packer,dave2/packer,youhong316/packer,ricardclau/packer,timsutton/packer,mkuzmin/packer,pecigonzalo/packer,paulmey/packer,mkuzmin/packer,paulmey/packer,youhong316/packer,pecigonzalo/packer,hashicorp/packer,mitchellh/packer,mkuzmin/packer,tas50/packer,dave2/packer