Merge branch 'ab/serve-cleanup' into jk/reduce-malloc-in-v2-servers

* ab/serve-cleanup:
  upload-pack: document and rename --advertise-refs
  serve.[ch]: remove "serve_options", split up --advertise-refs code
  {upload,receive}-pack tests: add --advertise-refs tests
  serve.c: move version line to advertise_capabilities()
  serve: move transfer.advertiseSID check into session_id_advertise()
  serve.[ch]: don't pass "struct strvec *keys" to commands
  serve: use designated initializers
  transport: use designated initializers
  transport: rename "fetch" in transport_vtable to "fetch_refs"
  serve: mark has_capability() as static

Documentation/technical/http-protocol.txt

@@ -225,6 +225,9 @@ The client may send Extra Parameters (see
 Documentation/technical/pack-protocol.txt) as a colon-separated string
 in the Git-Protocol HTTP header.
 
+Uses the `--http-backend-info-refs` option to
+linkgit:git-upload-pack[1].
+
 Dumb Server Response
 ^^^^^^^^^^^^^^^^^^^^
 Dumb servers MUST respond with the dumb server reply format.

Documentation/technical/protocol-v2.txt

@@ -81,6 +81,9 @@ A v2 server would reply:
 Subsequent requests are then made directly to the service
 `$GIT_URL/git-upload-pack`. (This works the same for git-receive-pack).
 
+Uses the `--http-backend-info-refs` option to
+linkgit:git-upload-pack[1].
+
 Capability Advertisement
 ------------------------