changed proxy_host default value from true to undef. fixes #211
changed proxy_host default value from false to undef. fixes #211
Merge branch 'proxy_val_no_boolean' of github.com:lotherk/puppetlabs-apt into proxy_val_no_boolean
Merge pull request #215 from lotherk/proxy_val_no_boolean

changed proxy_host default value from true to undef. fixes #211