serve: use repository pointer to get config

A few of the v2 "serve" callbacks ignore their repository parameter and
read config using the_repository (either directly or implicitly by
calling wrapper functions). This isn't a bug since the server code only
handles a single main repository anyway (and indeed, if you look at the
callers, these repository parameters will always be the_repository). But
in the long run we want to get rid of the_repository, so let's take a
tiny step in that direction.

As a bonus, this silences some -Wunused-parameter warnings.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/upload-pack.c b/upload-pack.c
index 551f22f..bcb702a 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -1775,26 +1775,26 @@ int upload_pack_advertise(struct repository *r,
 
 		strbuf_addstr(value, "shallow wait-for-done");
 
-		if (!repo_config_get_bool(the_repository,
+		if (!repo_config_get_bool(r,
 					 "uploadpack.allowfilter",
 					 &allow_filter_value) &&
 		    allow_filter_value)
 			strbuf_addstr(value, " filter");
 
-		if (!repo_config_get_bool(the_repository,
+		if (!repo_config_get_bool(r,
 					 "uploadpack.allowrefinwant",
 					 &allow_ref_in_want) &&
 		    allow_ref_in_want)
 			strbuf_addstr(value, " ref-in-want");
 
 		if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
-		    (!repo_config_get_bool(the_repository,
+		    (!repo_config_get_bool(r,
 					   "uploadpack.allowsidebandall",
 					   &allow_sideband_all_value) &&
 		     allow_sideband_all_value))
 			strbuf_addstr(value, " sideband-all");
 
-		if (!repo_config_get_string(the_repository,
+		if (!repo_config_get_string(r,
 					    "uploadpack.blobpackfileuri",
 					    &str) &&
 		    str) {