dns/powerdns: update 4.0.1 -> 4.0.3

• Switch to USES=localbase while here
• Remove LibreSSL patch (see https://github.com/PowerDNS/pdns/pull/4310)

Changes: https://doc.powerdns.com/md/changelog/#powerdns-authoritative-server-402

		https://doc.powerdns.com/md/changelog/#powerdns-authoritative-server-403

PR: 216136
Reported by: Dani <i.dani@outlook.com>
Submitted by: ghostonthewire@gmail.com (original 4.0.2 patch)
Approved by: Ralf van der Enden <tremere@cainites.net> (maintainer)
Security: CVE-2016-2120
Security: CVE-2016-7068
Security: CVE-2016-7072
Security: CVE-2016-7073
Security: CVE-2016-7074
Security: https://vuxml.FreeBSD.org/freebsd/e3200958-dd6c-11e6-ae1b-002590263bf5.html
MFH: 2017Q1