Log Message:
p5-Net-DNS-SEC: update to 1.17.

**** 1.17 Jun 26, 2020

	Recognise BIND private key accessed via symbolic link.

**** 1.16 May 11, 2020

	Improve testing of verify() functions.

	Rework code in Digest.pm

	SEC.xs code reduction.

**** 1.15 February 3, 2020

	Provide access to OpenSSL message digest implementations.

**** 1.14 October 14, 2019

	Improve exception capture in test scripts.

	Support more efficient algorithm mapping in Net::DNS.

**** 1.13 May 6, 2019

	Tweaks to resolve compilation errors with BoringSSL.