rpki-client 7.0

• Added RRDP (The RPKI Repository Delta Protocol, RFC 8182) support as a 'technology preview'. To use it, the -r flag needs to be used.
• Support the use of more than one URI in the TAL file sorting with a preference for https.
• Validation of ghostbuster records (RFC 6493).
• Fixed checks of the manifest validity interval.
• The rsync connection is now killed when the rsync server stalls.
• Limited the URL embedded in .cer files to alphanumeric characters and punctuation.
• Added a -V option to show version.
• Included the default cert.pem file path in tls_load_file error messages.
• Use of the ibuf (imsg) API for data exchange between the rpki-client processes.

In the portable version,

• Emit all output formats, no need to choose with options.
• Changes to for using GitHub actions for automatic testing.
• The RRDP support requires HTTPS connections, necessitating a dependency for libtls from LibreSSL.
• Support for building rpki-client on Mac OS X.
• Added expat as an extra dependency, needed for RRDP support.