config: make environment parsing routines static

Nobody outside of git_config_from_parameters should need
to use the GIT_CONFIG_PARAMETERS parsing functions, so let's
make them private.
Signed-off-by: NJeff King <peff@peff.net>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

cache.h

@@ -982,8 +982,6 @@ typedef int (*config_fn_t)(const char *, const char *, void *);
 extern int git_default_config(const char *, const char *, void *);
 extern int git_config_from_file(config_fn_t fn, const char *, void *);
 extern void git_config_push_parameter(const char *text);
-extern int git_config_parse_parameter(const char *text);
-extern int git_config_parse_environment(void);
 extern int git_config_from_parameters(config_fn_t fn, void *data);
 extern int git_config(config_fn_t fn, void *);
 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);

config.c

@@ -48,7 +48,7 @@ void git_config_push_parameter(const char *text)
 	strbuf_release(&env);
 }
 
-int git_config_parse_parameter(const char *text)
+static int git_config_parse_parameter(const char *text)
 {
 	struct config_item *ct;
 	struct strbuf tmp = STRBUF_INIT;
@@ -75,7 +75,7 @@ int git_config_parse_parameter(const char *text)
 	return 0;
 }
 
-int git_config_parse_environment(void) {
+static int git_config_parse_environment(void) {
 	const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
 	char *envw;
 	const char **argv = NULL;