rpki-client 6.8p1

This is the second release based on OpenBSD 6.8. It includes the following changes to the previous release:

• Incorporate OpenBSD 6.8 errata 006 of November 10, 2020: rpki-client incorrectly checks the manifest validity interval.

In the portable version:

• Add compat code for the LibreSSL ASN1_time_parse() and ASN1_time_tm_cmp() functions. Those are needed to properly check the validity of MFT files.