rpki-client 6.8p0

Portable release based on OpenBSD 6.8. It includes the following changes to the previous release:

• Improve how repositories are downloaded: do not fetch symlinks and clean extraneous files in the repositories after download using the cryptographically signed RPKI manifest listings.
• Fix a bug where rpki-client could hang after calling rsync.
• Remove the -f option, no longer needed.
• Improved validation of the trust anchors.
• Add new option -s timeout to make rpki-client automatically terminate after a timeout (default 1 hour). This helps when rpki-client is run via cron to prevent a hanging process to cause problems.

Portability improvements:

• Replace warnc() with warnx() + strerror()
• Replace b64_pton() with code using the libcrypto EVP_Decode* functionality.
• Adjust for OpenSSL 1.1.x compatible use of the EVP_ENCODE_CTX struct.