The `git_etc_gitconfig()` function retrieves the system-level path of
the configuration file. We're about to introduce a way to override it
via an environment variable, at which point the name of this function
would start to become misleading.

Rename the function to `git_system_config()` as a preparatory step.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 builtin/config.c | 2 +-
 config.c         | 6 +++---
 config.h         | 3 ++-
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/builtin/config.c b/builtin/config.c
index f71fa39b38..02ed0b3fe7 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -695,7 +695,7 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 		}
 	}
 	else if (use_system_config) {
-		given_config_source.file = git_etc_gitconfig();
+		given_config_source.file = git_system_config();
 		given_config_source.scope = CONFIG_SCOPE_SYSTEM;
 	} else if (use_local_config) {
 		given_config_source.file = git_pathdup("config");
diff --git a/config.c b/config.c
index 6428393a41..c552ab4ad9 100644
--- a/config.c
+++ b/config.c
@@ -1844,7 +1844,7 @@ static int git_config_from_blob_ref(config_fn_t fn,
 	return git_config_from_blob_oid(fn, name, &oid, data);
 }
 
-const char *git_etc_gitconfig(void)
+const char *git_system_config(void)
 {
 	static const char *system_wide;
 	if (!system_wide)
@@ -1896,10 +1896,10 @@ static int do_git_config_sequence(const struct config_options *opts,
 		repo_config = NULL;
 
 	current_parsing_scope = CONFIG_SCOPE_SYSTEM;
-	if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK,
+	if (git_config_system() && !access_or_die(git_system_config(), R_OK,
 						  opts->system_gently ?
 						  ACCESS_EACCES_OK : 0))
-		ret += git_config_from_file(fn, git_etc_gitconfig(),
+		ret += git_config_from_file(fn, git_system_config(),
 					    data);
 
 	current_parsing_scope = CONFIG_SCOPE_GLOBAL;
diff --git a/config.h b/config.h
index 19a9adbaa9..8e8376ae19 100644
--- a/config.h
+++ b/config.h
@@ -318,7 +318,6 @@ int git_config_rename_section(const char *, const char *);
 int git_config_rename_section_in_file(const char *, const char *, const char *);
 int git_config_copy_section(const char *, const char *);
 int git_config_copy_section_in_file(const char *, const char *, const char *);
-const char *git_etc_gitconfig(void);
 int git_env_bool(const char *, int);
 unsigned long git_env_ulong(const char *, unsigned long);
 int git_config_system(void);
@@ -327,6 +326,8 @@ int config_error_nonbool(const char *);
 #define config_error_nonbool(s) (config_error_nonbool(s), const_error())
 #endif
 
+const char *git_system_config(void);
+
 int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
 
 enum config_scope current_config_scope(void);
-- 
2.31.1