OpenBGPD 7.0

This release includes the following changes to the previous release:

• Stop processing queued UPDATES when the max-prefix limit was reached.
• Improve negotiation for route refresh, graceful restart and multi-protocol capabilities.
• Correctly track rde evaluate all and export settings during reload.
• Properly withdraw prefixes when rde evaluate all is used.
• Fix MRT handling on initial startup for message dump types.
• Fix and use non-blocking connect for RTR sessions.
• Fully implement RFC 6286 by checking for BGP ID collisions.
• Adjust the 4-byte AS number handling to RFC 6793 by changing error behaviour from prefix witdraw to attribute discard.
• In bgpctl print out both the sent "Neighbor capabilities" and the "Negotiated capabilities" for a session.
• Print timestamps both as a formatted and a pure time in seconds filed in various JSON objects.