git docs: add a category for file formats, protocols and interfaces

Create a new "File formats, protocols and other developer interfaces"
section in the main "git help git" manual page and start moving the
documentation that now lives in "Documentation/technical/*.git" over
to it. This complements the newly added and adjacent "Repository,
command and file interfaces" section.

This makes the technical documentation more accessible and
discoverable. Before this we wouldn't install it by default, and had
no ability to build man page versions of them. The links to them from
our existing documentation link to the generated HTML version of these
docs.

So let's start moving those over, starting with just the
"bundle-format.txt" documentation added in 7378ec90e1c (doc: describe
Git bundle format, 2020-02-07). We'll now have a new
gitformat-bundle(5) man page. Subsequent commits will move more git
internal format documentation over.

Unfortunately the syntax of the current Documentation/technical/*.txt
is not the same (when it comes to section headings etc.) as our
Documentation/*.txt documentation, so change the relevant bits of
syntax as we're moving this over.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 9 insertions, 5 deletions

diff --git a/Documentation/git-bundle.txt b/Documentation/git-bundle.txt
index 7685b57045..f0b1282b91 100644
--- a/Documentation/git-bundle.txt
+++ b/Documentation/git-bundle.txt
@@ -56,10 +56,9 @@ using "thin packs", bundles created using exclusions are smaller in
 size. That they're "thin" under the hood is merely noted here as a
 curiosity, and as a reference to other documentation.
 
-See link:technical/bundle-format.html[the `bundle-format`
-documentation] for more details and the discussion of "thin pack" in
-link:technical/pack-format.html[the pack format documentation] for
-further details.
+See linkgit:gitformat-bundle[5] for more details and the discussion of
+"thin pack" in link:technical/pack-format.html[the pack format
+documentation] for further details.
 
 OPTIONS
 -------
@@ -77,7 +76,7 @@ verify <file>::
 	commits exist and are fully linked in the current repository.
 	Then, 'git bundle' prints a list of missing commits, if any.
 	Finally, information about additional capabilities, such as "object
-	filter", is printed. See "Capabilities" in link:technical/bundle-format.html
+	filter", is printed. See "Capabilities" in linkgit:gitformat-bundle[5]
 	for more information. The exit code is zero for success, but will
 	be nonzero if the bundle file is invalid.
 
@@ -337,6 +336,11 @@ You can also see what references it offers:
 $ git ls-remote mybundle
 ----------------
 
+FILE FORMAT
+-----------
+
+See linkgit:gitformat-bundle[5].
+
 GIT
 ---
 Part of the linkgit:git[1] suite