Upstream merge of Debian 2.42.1 packaging (no quilt patches)

Source has been updated with changes from git and we use the Debian
packaging data here to match those up.

[endlessm/eos-shell#3276]
@sgnn7 You can add a dependency on eos:master:endless and eos:master:extra to your repo. Click on Advanced->Meta, and add this section:
```
  <repository block="never" rebuild="local" linkedbuild="all" name="extra">
    <path project="eos:master:endless" repository="endless"/>
    <path project="eos:master:extra" repository="extra"/>
    <arch>i586</arch>
    <arch>armv7hl</arch>
  </repository>
```