debian: get rid of whole debian/changelog
debian: get rid of whole debian/changelog

Future changes to this file should kept only one entry and update the
version number. Changelogs for "unofficial" (as not from Debian)
packages are usually quite boring.

The version number is also chosen such that the package can be
upgraded to an "official" package if one becomes available.

lochiiconnectivity/exabgp,benagricola/exabgp,dneiter/exabgp,lochiiconnectivity/exabgp,benagricola/exabgp,chrisy/exabgp,PowerDNS/exabgp,fugitifduck/exabgp,benagricola/exabgp,PowerDNS/exabgp,chrisy/exabgp,earies/exabgp,earies/exabgp,blablacar/exabgp,PowerDNS/exabgp,dneiter/exabgp,blablacar/exabgp,lochiiconnectivity/exabgp,dneiter/exabgp,chrisy/exabgp,earies/exabgp,fugitifduck/exabgp,fugitifduck/exabgp,blablacar/exabgp