Revert "config: update maintainer in control.in"

I'm getting the pkgbinarymangler sed error on local binary package builds again now you've done this revert. Please put it back in until such time as you have a fix. sed called from pkgbinarymangler doesn't like the / in Trisquel GNU/Linux for the maintainer fields we both thought last time. I couldn't work out which env var pkgbinarymangler was using when I tried, but my idea was to change it to Trisquel GNU+Linux .

What I can tell you is I'm unable to change the string used by pkgmaintainermangler by changing trisquel-builder/hooks/E10trisquel and G10trisquel and/or DEBFULLNAME in t/p-h/helpers/config .