setup: move cffi stuff to mercurial/cffi
This patch moves all setup*cffi stuff to mercurial/cffi to make the root
directory cleaner. The idea was from mpm [1]:
> It seems like we could have a fair amount of cffi definitions, and
> cluttering the root directory (or mercurial/) with them is probably not
> a great long-term solution. We could probably add a cffi/ directory
> under mercurial/ to parallel pure/.
[1]: https://www.mercurial-scm.org/pipermail/mercurial-devel/2016-July/086442.html
docheader = '<?xml version="1.0"?>\n<log>\n'
docfooter = '</log>\n'
changeset = '<logentry revision="{rev}" node="{node}">\n{branches}{bookmarks}{tags}{parents}<author email="{author|email|xmlescape}">{author|person|xmlescape}</author>\n<date>{date|rfc3339date}</date>\n<msg xml:space="preserve">{desc|xmlescape}</msg>\n</logentry>\n'
changeset_verbose = '<logentry revision="{rev}" node="{node}">\n{branches}{bookmarks}{tags}{parents}<author email="{author|email|xmlescape}">{author|person|xmlescape}</author>\n<date>{date|rfc3339date}</date>\n<msg xml:space="preserve">{desc|xmlescape}</msg>\n<paths>\n{file_adds}{file_dels}{file_mods}</paths>\n{file_copies}</logentry>\n'
changeset_debug = '<logentry revision="{rev}" node="{node}">\n{branches}{bookmarks}{tags}{parents}<author email="{author|email|xmlescape}">{author|person|xmlescape}</author>\n<date>{date|rfc3339date}</date>\n<msg xml:space="preserve">{desc|xmlescape}</msg>\n<paths>\n{file_adds}{file_dels}{file_mods}</paths>\n{file_copies}{extras}</logentry>\n'
file_add = '<path action="A">{file_add|xmlescape}</path>\n'
file_mod = '<path action="M">{file_mod|xmlescape}</path>\n'
file_del = '<path action="R">{file_del|xmlescape}</path>\n'
start_file_copies = '<copies>\n'
file_copy = '<copy source="{source|xmlescape}">{name|xmlescape}</copy>\n'
end_file_copies = '</copies>\n'
parent = '<parent revision="{rev}" node="{node}" />\n'
branch = '<branch>{branch|xmlescape}</branch>\n'
tag = '<tag>{tag|xmlescape}</tag>\n'
bookmark = '<bookmark>{bookmark|xmlescape}</bookmark>\n'
extra = '<extra key="{key|xmlescape}">{value|xmlescape}</extra>\n'