be more robust with chmod in pdns-server.postinst

Thanks: Peter van Dijk
Closes: 716859
fix exit code of init script to be more LSB compliant.

Closes: #708861
remove unnecessary MySQL dependency (Upstream #1032). Adapt patches.

Closes: #725073
remove double code from postinst

Thanks: Peter van Dijk
Closes: 725195
changelog
changelog for release
new changelog
fix mysql schema including upgrade
sqlite3 schema fixes
fix syntax error in pgsql schema update; update pgsql schema
travis