6.0.0: the routes of a helper using API 4 stay when it exits Issue #304 withdraws the routes of a helper which exits only when it uses API 6, or never said which API it uses. A helper written with the commands of 4.x and 5.x keeps its routes, as it always did, and `on-exit` decides for either. `exabgp migrate conf` writes `on-exit keep;`, as `--wrap-api` moves the helper to API 6. The breaking change goes from medium to low.
6.0.0: a syntax reference generated from the parser Configuration/Syntax-Reference.md is every section and keyword the configuration reads, what each takes, its default and what it is for, as `exabgp configuration syntax` prints them. It is generated whole by qa/bin/update_wiki_syntax in the exabgp repository, so it cannot list a keyword the parser refuses or miss one it reads. The hand-written pages link to it.