ident.c: mark private file-scope symbols as static

Signed-off-by: NJunio C Hamano <gitster@pobox.com>

cache.h

@@ -901,9 +901,7 @@ extern const char *git_author_info(int);
 extern const char *git_committer_info(int);
 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 extern const char *fmt_name(const char *name, const char *email);
-extern const char *ident_default_name(void);
 extern const char *ident_default_email(void);
-extern const char *ident_default_date(void);
 extern const char *git_editor(void);
 extern const char *git_pager(int stdout_is_tty);
 extern int git_ident_config(const char *, const char *, void *);

ident.c

@@ -93,7 +93,7 @@ static void copy_email(const struct passwd *pw, struct strbuf *email)
 	add_domainname(email);
 }
 
-const char *ident_default_name(void)
+static const char *ident_default_name(void)
 {
 	if (!git_default_name.len) {
 		copy_gecos(xgetpwuid_self(), &git_default_name);
@@ -117,7 +117,7 @@ const char *ident_default_email(void)
 	return git_default_email.buf;
 }
 
-const char *ident_default_date(void)
+static const char *ident_default_date(void)
 {
 	if (!git_default_date[0])
 		datestamp(git_default_date, sizeof(git_default_date));