patch 8.2.4343: when reloading not all properties are detected

Problem:    When reloading not all properties are detected.
Solution:   Add the "edit" value to v:fcs_choice. (Rob Pilling, closes #9579)
diff --git a/src/proto/fileio.pro b/src/proto/fileio.pro
index da6054b..3f7b30d 100644
--- a/src/proto/fileio.pro
+++ b/src/proto/fileio.pro
@@ -28,7 +28,7 @@
 int vim_rename(char_u *from, char_u *to);
 int check_timestamps(int focus);
 int buf_check_timestamp(buf_T *buf, int focus);
-void buf_reload(buf_T *buf, int orig_mode);
+void buf_reload(buf_T *buf, int orig_mode, int reload_options);
 void buf_store_time(buf_T *buf, stat_T *st, char_u *fname);
 void write_lnum_adjust(linenr_T offset);
 int readdir_core(garray_T *gap, char_u *path, int withattr, void *context, int (*checkitem)(void *context, void *item), int sort);