Fix: correct fail-early option

Cred to @ploxiln for pointing this out.
put fail-early option in file header

Better to enable it for the whole file.
deb: add `Homepage` to control file

@ploxiln requested this.
fix(deb/init): avoid duplicate `setuid`

Cred to @ploxlin for spotting this.
deb: set `setgid` in init config

Missed this previously.
fix: avoid unnecessary `|| echo ""`