Log message:
net/bgpipe: Add bgpipe-0.22.0

Open-source tool that processes BGP messages through
a pipeline of composable stages.

What is bgpipe?

bgpipe sits between routers as a transparent proxy, auditing,
filtering, and transforming BGP sessions on the fly.
Think of it as a scriptable BGP firewall and traffic processor.

Use cases:
* BGP firewall with RPKI validation, prefix limits, and rate limiting
* Bidirectional BGP to JSON translation including Flowspec - pipe through
  jq, Python, anything
* MRT file processing and conversion at scale, incl. RIB snapshots (table dumps)
* Scriptable pipeline - chain stages or pipe through external programs
* Live BGP monitoring from RIPE RIS Live or RouteViews with real-time filters
* Secure transport - add TCP-MD5 to sessions, proxy over encrypted WebSockets

Highlights
MRT table dumps: read RIB snapshots as BGP updates
Output tail loss fixed

Added
* read: MRT TABLE_DUMP and TABLE_DUMP_V2 RIB snapshots, with peer tagging and \ 
prefix bundling
* aspa: --first-hop option
* Auto-detection of RouteViews and RIPE RIS RIB file names
Fixed
* write: dropped an arbitrary tail of the output at shutdown
* core: buffered output could be lost at pipeline shutdown
* update: no longer adds path attributes to pure withdrawals (RFC 4271)
* limit: --permanent keeps withdrawals; corrected the --min-length error message
* listen: close the listener on error paths
* speaker: invalid --id reports an error instead of panicking
* config: empty stage arguments are rejected cleanly instead of panicking
* HTTP API: no panic when two stages produce colliding slugs
* RPKI: reconnect immediately on RTR version downgrade; warn when an RTR v1 \ 
server is used with ASPA
* RPKI: idempotent metric registration, fixing a panic under go test -count>1
* extio: return pooled buffers on send failure
* pprof: standalone server support and a shutdown fix
* rv-live: cleanup and documentation corrections
Docs and testing
* New MRT reference page covering both dump families, peer tags, bundling, \ 
format detection and use cases
* New HTTP API reference
* Docker-based integration suite against GoBGP, BIRD, FRR, StayRTR and rtrtr, \ 
covering transparent proxying, MRT replay, ASPA over RTR and ROA revocation
* Numerous stage documentation corrections (speaker, update, rv-live, connect, \ 
filters, quickstart)