Log Message:
mozilla-rootcerts: update to 20200529

pkgsrc changes: Delete roots which expired today or earlier:
C = SE, O = AddTrust AB, OU = AddTrust TTP Network, CN = AddTrust Class 1 CA Root
C = SE, O = AddTrust AB, OU = AddTrust External TTP Network, CN = AddTrust \ 
External CA Root
C = NL, O = Staat der Nederlanden, CN = Staat der Nederlanden Root CA - G2

Upstream changes:
1618404 - Set CKA_NSS_SERVER_DISTRUST_AFTER for Symantec root
1621159 - Set CKA_NSS_SERVER_DISTRUST_AFTER for Consorci AOC,
          GRCA, and SK ID root certs. r=jcj