patch 8.1.1291: not easy to change directory and restore
Problem: Not easy to change directory and restore.
Solution: Add the chdir() function. (Yegappan Lakshmanan, closes #4358)
diff --git a/src/proto/ex_docmd.pro b/src/proto/ex_docmd.pro
index 9934d60..6714b38 100644
--- a/src/proto/ex_docmd.pro
+++ b/src/proto/ex_docmd.pro
@@ -37,7 +37,8 @@
void tabpage_new(void);
void do_exedit(exarg_T *eap, win_T *old_curwin);
void free_cd_dir(void);
-void post_chdir(int tablocal, int winlocal);
+void post_chdir(cdscope_T cdscope);
+int changedir_func(char_u *new_dir, int forceit, cdscope_T cdscope);
void ex_cd(exarg_T *eap);
void do_sleep(long msec);
void ex_may_print(exarg_T *eap);