MFH: r434356

Update to upstream release 5.1.0; fix several invalid memory reads

PR: 216847
Submitted by: pkubaj@anongoth.pl
Reviewed by: riggs
Security: CVE-2016-10169

		CVE-2016-10170
		CVE-2016-10171
		CVE-2016-10172

Approved by: ports-secteam (junovitch)